Author: vorlon
Date: Sat Nov 11 03:17:54 2006
New Revision: 7742
Added:
dists/trunk/linux-2.6/debian/patches/features/mm-balance-dirty-pages.patch
dists/trunk/linux-2.6/debian/patches/features/mm-do_wp_page-fixup.patch
dists/trunk/linux-2.6/debian/patches/features/mm-install_page-cleanup.patch
dists/trunk/linux-2.6/debian/patches/features/mm-msync-cleanup.patch
dists/trunk/linux-2.6/debian/patches/features/mm-optimize-mprotect.patch
dists/trunk/linux-2.6/debian/patches/features/mm-tracking-shared-dirty-pages.patch
Modified:
dists/trunk/linux-2.6/debian/arch/defines
dists/trunk/linux-2.6/debian/changelog
dists/trunk/linux-2.6/debian/patches/series/6
Log:
re-add revision 7722, this time documenting the ABI change
Modified: dists/trunk/linux-2.6/debian/arch/defines
==============================================================================
--- dists/trunk/linux-2.6/debian/arch/defines (original)
+++ dists/trunk/linux-2.6/debian/arch/defines Sat Nov 11 03:17:54 2006
@@ -1,5 +1,5 @@
[abi]
-abiname: 2
+abiname: 3
[base]
arches:
Modified: dists/trunk/linux-2.6/debian/changelog
==============================================================================
--- dists/trunk/linux-2.6/debian/changelog (original)
+++ dists/trunk/linux-2.6/debian/changelog Sat Nov 11 03:17:54 2006
@@ -3,6 +3,13 @@
[ maximilian attems ]
* Enable the new ACT modules globaly. They were already set for amd64, hppa
and mips/mipsel - needed by newer iproute2. (closes: #395882)
+ * Fix msync() for LSB 3.1 compliance, backport fedora patches from 2.6.19
+ - mm: tracking shared dirty pages
+ - mm: balance dirty pages
+ - mm: optimize the new mprotect() code a bit
+ - mm: small cleanup of install_page()
+ - mm: fixup do_wp_page()
+ - mm: msync() cleanup (closes: 394392)
[ Steve Langasek ]
* [alpha] new titan-video patch, for compatibility with TITAN and similar
@@ -10,6 +17,7 @@
* [alpha] bugfix for srm_env module from upstream (Jan-Benedict Glaw),
makes the module compatible with the current /proc interface so that
reads no longer return EFAULT. Closes: #353079.
+ * Bump ABI to 3 for the msync fixes above.
[ Martin Michlmayr ]
- arm: Set CONFIG_BINFMT_MISC=m
Added:
dists/trunk/linux-2.6/debian/patches/features/mm-balance-dirty-pages.patch
==============================================================================
--- (empty file)
+++ dists/trunk/linux-2.6/debian/patches/features/mm-balance-dirty-pages.patch
Sat Nov 11 03:17:54 2006
@@ -0,0 +1,91 @@
+From [EMAIL PROTECTED] Tue Sep 26 20:23:25 2006
+Date: Tue, 26 Sep 2006 15:59:54 GMT
+Message-Id: <[EMAIL PROTECTED]>
+From: Linux Kernel Mailing List <[email protected]>
+To: [email protected]
+Subject: [PATCH] mm: balance dirty pages
+
+commit edc79b2a46ed854595e40edcf3f8b37f9f14aa3f
+tree c1120bebede9660ab00f9439aa7a84ab9434ac38
+parent d08b3851da41d0ee60851f2c75b118e1f7a5fc89
+author Peter Zijlstra <[EMAIL PROTECTED]> 1159252258 -0700
+committer Linus Torvalds <[EMAIL PROTECTED]> 1159285724 -0700
+
+[PATCH] mm: balance dirty pages
+
+Now that we can detect writers of shared mappings, throttle them. Avoids OOM
+by surprise.
+
+Signed-off-by: Peter Zijlstra <[EMAIL PROTECTED]>
+Cc: Hugh Dickins <[EMAIL PROTECTED]>
+Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
+Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
+
+ include/linux/writeback.h | 1 +
+ mm/memory.c | 5 +++--
+ mm/page-writeback.c | 10 ++++++++++
+ 3 files changed, 14 insertions(+), 2 deletions(-)
+
+diff --git a/include/linux/writeback.h b/include/linux/writeback.h
+index 0422036..56a23a0 100644
+--- a/include/linux/writeback.h
++++ b/include/linux/writeback.h
+@@ -116,6 +116,7 @@ int sync_page_range(struct inode *inode,
+ loff_t pos, loff_t count);
+ int sync_page_range_nolock(struct inode *inode, struct address_space *mapping,
+ loff_t pos, loff_t count);
++void set_page_dirty_balance(struct page *page);
+
+ /* pdflush.c */
+ extern int nr_pdflush_threads; /* Global so it can be exported to
sysctl
+diff --git a/mm/memory.c b/mm/memory.c
+index fa941b1..dd7d7fc 100644
+--- a/mm/memory.c
++++ b/mm/memory.c
+@@ -49,6 +49,7 @@ #include <linux/rmap.h>
+ #include <linux/module.h>
+ #include <linux/delayacct.h>
+ #include <linux/init.h>
++#include <linux/writeback.h>
+
+ #include <asm/pgalloc.h>
+ #include <asm/uaccess.h>
+@@ -1571,7 +1572,7 @@ gotten:
+ unlock:
+ pte_unmap_unlock(page_table, ptl);
+ if (dirty_page) {
+- set_page_dirty(dirty_page);
++ set_page_dirty_balance(dirty_page);
+ put_page(dirty_page);
+ }
+ return ret;
+@@ -2218,7 +2219,7 @@ retry:
+ unlock:
+ pte_unmap_unlock(page_table, ptl);
+ if (dirty_page) {
+- set_page_dirty(dirty_page);
++ set_page_dirty_balance(dirty_page);
+ put_page(dirty_page);
+ }
+ return ret;
+diff --git a/mm/page-writeback.c b/mm/page-writeback.c
+index 1c87430..b9f4c6f 100644
+--- a/mm/page-writeback.c
++++ b/mm/page-writeback.c
+@@ -244,6 +244,16 @@ static void balance_dirty_pages(struct a
+ pdflush_operation(background_writeout, 0);
+ }
+
++void set_page_dirty_balance(struct page *page)
++{
++ if (set_page_dirty(page)) {
++ struct address_space *mapping = page_mapping(page);
++
++ if (mapping)
++ balance_dirty_pages_ratelimited(mapping);
++ }
++}
++
+ /**
+ * balance_dirty_pages_ratelimited_nr - balance dirty memory state
+ * @mapping: address_space which was dirtied
Added: dists/trunk/linux-2.6/debian/patches/features/mm-do_wp_page-fixup.patch
==============================================================================
--- (empty file)
+++ dists/trunk/linux-2.6/debian/patches/features/mm-do_wp_page-fixup.patch
Sat Nov 11 03:17:54 2006
@@ -0,0 +1,71 @@
+From [EMAIL PROTECTED] Tue Sep 26 20:23:26 2006
+Date: Tue, 26 Sep 2006 15:59:57 GMT
+Message-Id: <[EMAIL PROTECTED]>
+From: Linux Kernel Mailing List <[email protected]>
+To: [email protected]
+Subject: [PATCH] mm: fixup do_wp_page()
+
+commit ee6a6457886a80415db209e87033b63f2b06558c
+tree 227351bf31ccc6153879cc900c5d6a822832b645
+parent e88dd6c11c5aef74d8b74a062767add53315533b
+author Peter Zijlstra <[EMAIL PROTECTED]> 1159252260 -0700
+committer Linus Torvalds <[EMAIL PROTECTED]> 1159285724 -0700
+
+[PATCH] mm: fixup do_wp_page()
+
+Wrt. the recent modifications in do_wp_page() Hugh Dickins pointed out:
+
+ "I now realize it's right to the first order (normal case) and to the
+ second order (ptrace poke), but not to the third order (ptrace poke
+ anon page here to be COWed - perhaps can't occur without intervening
+ mprotects)."
+
+This patch restores the old COW behaviour for anonymous pages.
+
+Signed-off-by: Peter Zijlstra <[EMAIL PROTECTED]>
+Acked-by: Hugh Dickins <[EMAIL PROTECTED]>
+Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
+Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
+
+ mm/memory.c | 19 +++++++++++++------
+ 1 file changed, 13 insertions(+), 6 deletions(-)
+
+diff --git a/mm/memory.c b/mm/memory.c
+index dd7d7fc..6596253 100644
+--- a/mm/memory.c
++++ b/mm/memory.c
+@@ -1467,11 +1467,21 @@ static int do_wp_page(struct mm_struct *
+ goto gotten;
+
+ /*
+- * Only catch write-faults on shared writable pages, read-only
+- * shared pages can get COWed by get_user_pages(.write=1, .force=1).
++ * Take out anonymous pages first, anonymous shared vmas are
++ * not dirty accountable.
+ */
+- if (unlikely((vma->vm_flags & (VM_WRITE|VM_SHARED)) ==
++ if (PageAnon(old_page)) {
++ if (!TestSetPageLocked(old_page)) {
++ reuse = can_share_swap_page(old_page);
++ unlock_page(old_page);
++ }
++ } else if (unlikely((vma->vm_flags & (VM_WRITE|VM_SHARED)) ==
+ (VM_WRITE|VM_SHARED))) {
++ /*
++ * Only catch write-faults on shared writable pages,
++ * read-only shared pages can get COWed by
++ * get_user_pages(.write=1, .force=1).
++ */
+ if (vma->vm_ops && vma->vm_ops->page_mkwrite) {
+ /*
+ * Notify the address space that the page is about to
+@@ -1503,9 +1513,6 @@ static int do_wp_page(struct mm_struct *
+ dirty_page = old_page;
+ get_page(dirty_page);
+ reuse = 1;
+- } else if (PageAnon(old_page) && !TestSetPageLocked(old_page)) {
+- reuse = can_share_swap_page(old_page);
+- unlock_page(old_page);
+ }
+
+ if (reuse) {
Added:
dists/trunk/linux-2.6/debian/patches/features/mm-install_page-cleanup.patch
==============================================================================
--- (empty file)
+++ dists/trunk/linux-2.6/debian/patches/features/mm-install_page-cleanup.patch
Sat Nov 11 03:17:54 2006
@@ -0,0 +1,42 @@
+From [EMAIL PROTECTED] Tue Sep 26 20:23:25 2006
+Date: Tue, 26 Sep 2006 15:59:56 GMT
+Message-Id: <[EMAIL PROTECTED]>
+From: Linux Kernel Mailing List <[email protected]>
+To: [email protected]
+Subject: [PATCH] mm: small cleanup of install_page()
+
+commit e88dd6c11c5aef74d8b74a062767add53315533b
+tree cf1b66d110e33ab4d6a22438dff4508dd785acd1
+parent c1e6098b23bb46e2b488fe9a26f831f867157483
+author Peter Zijlstra <[EMAIL PROTECTED]> 1159252259 -0700
+committer Linus Torvalds <[EMAIL PROTECTED]> 1159285724 -0700
+
+[PATCH] mm: small cleanup of install_page()
+
+Smallish cleanup to install_page(), could save a memory read (haven't checked
+the asm output) and sure looks nicer.
+
+Signed-off-by: Peter Zijlstra <[EMAIL PROTECTED]>
+Cc: Hugh Dickins <[EMAIL PROTECTED]>
+Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
+Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
+
+ mm/fremap.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/mm/fremap.c b/mm/fremap.c
+index 21b7d0c..aa30618 100644
+--- a/mm/fremap.c
++++ b/mm/fremap.c
+@@ -79,9 +79,9 @@ int install_page(struct mm_struct *mm, s
+ inc_mm_counter(mm, file_rss);
+
+ flush_icache_page(vma, page);
+- set_pte_at(mm, addr, pte, mk_pte(page, prot));
++ pte_val = mk_pte(page, prot);
++ set_pte_at(mm, addr, pte, pte_val);
+ page_add_file_rmap(page);
+- pte_val = *pte;
+ update_mmu_cache(vma, addr, pte_val);
+ lazy_mmu_prot_update(pte_val);
+ err = 0;
Added: dists/trunk/linux-2.6/debian/patches/features/mm-msync-cleanup.patch
==============================================================================
--- (empty file)
+++ dists/trunk/linux-2.6/debian/patches/features/mm-msync-cleanup.patch
Sat Nov 11 03:17:54 2006
@@ -0,0 +1,291 @@
+From [EMAIL PROTECTED] Tue Sep 26 20:23:26 2006
+Date: Tue, 26 Sep 2006 15:59:58 GMT
+Message-Id: <[EMAIL PROTECTED]>
+From: Linux Kernel Mailing List <[email protected]>
+To: [email protected]
+Subject: [PATCH] mm: msync() cleanup
+
+commit 204ec841fbea3e5138168edbc3a76d46747cc987
+tree bc52089e8862b24d7f4153b56eaf7ecc3f1af9fe
+parent ee6a6457886a80415db209e87033b63f2b06558c
+author Peter Zijlstra <[EMAIL PROTECTED]> 1159252261 -0700
+committer Linus Torvalds <[EMAIL PROTECTED]> 1159285725 -0700
+
+[PATCH] mm: msync() cleanup
+
+With the tracking of dirty pages properly done now, msync doesn't need to scan
+the PTEs anymore to determine the dirty status.
+
+From: Hugh Dickins <[EMAIL PROTECTED]>
+
+In looking to do that, I made some other tidyups: can remove several
+#includes, and sys_msync loop termination not quite right.
+
+Most of those points are criticisms of the existing sys_msync, not of your
+patch. In particular, the loop termination errors were introduced in 2.6.17:
+I did notice this shortly before it came out, but decided I was more likely to
+get it wrong myself, and make matters worse if I tried to rush a last-minute
+fix in. And it's not terribly likely to go wrong, nor disastrous if it does
+go wrong (may miss reporting an unmapped area; may also fsync file of a
+following vma).
+
+Signed-off-by: Peter Zijlstra <[EMAIL PROTECTED]>
+Signed-off-by: Hugh Dickins <[EMAIL PROTECTED]>
+Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
+Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
+
+ mm/msync.c | 196
++++++++++---------------------------------------------------
+ 1 file changed, 33 insertions(+), 163 deletions(-)
+
+diff --git a/mm/msync.c b/mm/msync.c
+index d083544..358d73c 100644
+--- a/mm/msync.c
++++ b/mm/msync.c
+@@ -7,149 +7,33 @@
+ /*
+ * The msync() system call.
+ */
+-#include <linux/slab.h>
+-#include <linux/pagemap.h>
+ #include <linux/fs.h>
+ #include <linux/mm.h>
+ #include <linux/mman.h>
+-#include <linux/hugetlb.h>
+-#include <linux/writeback.h>
+ #include <linux/file.h>
+ #include <linux/syscalls.h>
+
+-#include <asm/pgtable.h>
+-#include <asm/tlbflush.h>
+-
+-static unsigned long msync_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
+- unsigned long addr, unsigned long end)
+-{
+- pte_t *pte;
+- spinlock_t *ptl;
+- int progress = 0;
+- unsigned long ret = 0;
+-
+-again:
+- pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
+- do {
+- struct page *page;
+-
+- if (progress >= 64) {
+- progress = 0;
+- if (need_resched() || need_lockbreak(ptl))
+- break;
+- }
+- progress++;
+- if (!pte_present(*pte))
+- continue;
+- if (!pte_maybe_dirty(*pte))
+- continue;
+- page = vm_normal_page(vma, addr, *pte);
+- if (!page)
+- continue;
+- if (ptep_clear_flush_dirty(vma, addr, pte) ||
+- page_test_and_clear_dirty(page))
+- ret += set_page_dirty(page);
+- progress += 3;
+- } while (pte++, addr += PAGE_SIZE, addr != end);
+- pte_unmap_unlock(pte - 1, ptl);
+- cond_resched();
+- if (addr != end)
+- goto again;
+- return ret;
+-}
+-
+-static inline unsigned long msync_pmd_range(struct vm_area_struct *vma,
+- pud_t *pud, unsigned long addr, unsigned long end)
+-{
+- pmd_t *pmd;
+- unsigned long next;
+- unsigned long ret = 0;
+-
+- pmd = pmd_offset(pud, addr);
+- do {
+- next = pmd_addr_end(addr, end);
+- if (pmd_none_or_clear_bad(pmd))
+- continue;
+- ret += msync_pte_range(vma, pmd, addr, next);
+- } while (pmd++, addr = next, addr != end);
+- return ret;
+-}
+-
+-static inline unsigned long msync_pud_range(struct vm_area_struct *vma,
+- pgd_t *pgd, unsigned long addr, unsigned long end)
+-{
+- pud_t *pud;
+- unsigned long next;
+- unsigned long ret = 0;
+-
+- pud = pud_offset(pgd, addr);
+- do {
+- next = pud_addr_end(addr, end);
+- if (pud_none_or_clear_bad(pud))
+- continue;
+- ret += msync_pmd_range(vma, pud, addr, next);
+- } while (pud++, addr = next, addr != end);
+- return ret;
+-}
+-
+-static unsigned long msync_page_range(struct vm_area_struct *vma,
+- unsigned long addr, unsigned long end)
+-{
+- pgd_t *pgd;
+- unsigned long next;
+- unsigned long ret = 0;
+-
+- /* For hugepages we can't go walking the page table normally,
+- * but that's ok, hugetlbfs is memory based, so we don't need
+- * to do anything more on an msync().
+- */
+- if (vma->vm_flags & VM_HUGETLB)
+- return 0;
+-
+- BUG_ON(addr >= end);
+- pgd = pgd_offset(vma->vm_mm, addr);
+- flush_cache_range(vma, addr, end);
+- do {
+- next = pgd_addr_end(addr, end);
+- if (pgd_none_or_clear_bad(pgd))
+- continue;
+- ret += msync_pud_range(vma, pgd, addr, next);
+- } while (pgd++, addr = next, addr != end);
+- return ret;
+-}
+-
+ /*
+ * MS_SYNC syncs the entire file - including mappings.
+ *
+- * MS_ASYNC does not start I/O (it used to, up to 2.5.67). Instead, it just
+- * marks the relevant pages dirty. The application may now run fsync() to
++ * MS_ASYNC does not start I/O (it used to, up to 2.5.67).
++ * Nor does it marks the relevant pages dirty (it used to up to 2.6.17).
++ * Now it doesn't do anything, since dirty pages are properly tracked.
++ *
++ * The application may now run fsync() to
+ * write out the dirty pages and wait on the writeout and check the result.
+ * Or the application may run fadvise(FADV_DONTNEED) against the fd to start
+ * async writeout immediately.
+ * So by _not_ starting I/O in MS_ASYNC we provide complete flexibility to
+ * applications.
+ */
+-static int msync_interval(struct vm_area_struct *vma, unsigned long addr,
+- unsigned long end, int flags,
+- unsigned long *nr_pages_dirtied)
+-{
+- struct file *file = vma->vm_file;
+-
+- if ((flags & MS_INVALIDATE) && (vma->vm_flags & VM_LOCKED))
+- return -EBUSY;
+-
+- if (file && (vma->vm_flags & VM_SHARED))
+- *nr_pages_dirtied = msync_page_range(vma, addr, end);
+- return 0;
+-}
+-
+ asmlinkage long sys_msync(unsigned long start, size_t len, int flags)
+ {
+ unsigned long end;
++ struct mm_struct *mm = current->mm;
+ struct vm_area_struct *vma;
+ int unmapped_error = 0;
+ int error = -EINVAL;
+- int done = 0;
+
+ if (flags & ~(MS_ASYNC | MS_INVALIDATE | MS_SYNC))
+ goto out;
+@@ -169,64 +53,50 @@ asmlinkage long sys_msync(unsigned long
+ * If the interval [start,end) covers some unmapped address ranges,
+ * just ignore them, but return -ENOMEM at the end.
+ */
+- down_read(¤t->mm->mmap_sem);
+- vma = find_vma(current->mm, start);
+- if (!vma) {
+- error = -ENOMEM;
+- goto out_unlock;
+- }
+- do {
+- unsigned long nr_pages_dirtied = 0;
++ down_read(&mm->mmap_sem);
++ vma = find_vma(mm, start);
++ for (;;) {
+ struct file *file;
+
++ /* Still start < end. */
++ error = -ENOMEM;
++ if (!vma)
++ goto out_unlock;
+ /* Here start < vma->vm_end. */
+ if (start < vma->vm_start) {
+- unmapped_error = -ENOMEM;
+ start = vma->vm_start;
++ if (start >= end)
++ goto out_unlock;
++ unmapped_error = -ENOMEM;
+ }
+ /* Here vma->vm_start <= start < vma->vm_end. */
+- if (end <= vma->vm_end) {
+- if (start < end) {
+- error = msync_interval(vma, start, end, flags,
+- &nr_pages_dirtied);
+- if (error)
+- goto out_unlock;
+- }
+- error = unmapped_error;
+- done = 1;
+- } else {
+- /* Here vma->vm_start <= start < vma->vm_end < end. */
+- error = msync_interval(vma, start, vma->vm_end, flags,
+- &nr_pages_dirtied);
+- if (error)
+- goto out_unlock;
++ if ((flags & MS_INVALIDATE) &&
++ (vma->vm_flags & VM_LOCKED)) {
++ error = -EBUSY;
++ goto out_unlock;
+ }
+ file = vma->vm_file;
+ start = vma->vm_end;
+- if ((flags & MS_ASYNC) && file && nr_pages_dirtied) {
+- get_file(file);
+- up_read(¤t->mm->mmap_sem);
+- balance_dirty_pages_ratelimited_nr(file->f_mapping,
+- nr_pages_dirtied);
+- fput(file);
+- down_read(¤t->mm->mmap_sem);
+- vma = find_vma(current->mm, start);
+- } else if ((flags & MS_SYNC) && file &&
++ if ((flags & MS_SYNC) && file &&
+ (vma->vm_flags & VM_SHARED)) {
+ get_file(file);
+- up_read(¤t->mm->mmap_sem);
++ up_read(&mm->mmap_sem);
+ error = do_fsync(file, 0);
+ fput(file);
+- down_read(¤t->mm->mmap_sem);
+- if (error)
+- goto out_unlock;
+- vma = find_vma(current->mm, start);
++ if (error || start >= end)
++ goto out;
++ down_read(&mm->mmap_sem);
++ vma = find_vma(mm, start);
+ } else {
++ if (start >= end) {
++ error = 0;
++ goto out_unlock;
++ }
+ vma = vma->vm_next;
+ }
+- } while (vma && !done);
++ }
+ out_unlock:
+- up_read(¤t->mm->mmap_sem);
++ up_read(&mm->mmap_sem);
+ out:
+- return error;
++ return error ? : unmapped_error;
+ }
Added: dists/trunk/linux-2.6/debian/patches/features/mm-optimize-mprotect.patch
==============================================================================
--- (empty file)
+++ dists/trunk/linux-2.6/debian/patches/features/mm-optimize-mprotect.patch
Sat Nov 11 03:17:54 2006
@@ -0,0 +1,135 @@
+From [EMAIL PROTECTED] Tue Sep 26 20:23:25 2006
+Date: Tue, 26 Sep 2006 15:59:55 GMT
+Message-Id: <[EMAIL PROTECTED]>
+From: Linux Kernel Mailing List <[email protected]>
+To: [email protected]
+Subject: [PATCH] mm: optimize the new mprotect() code a bit
+
+commit c1e6098b23bb46e2b488fe9a26f831f867157483
+tree 6bac4d3cfaab3e7153a15d1a24f9211b2de37ba6
+parent edc79b2a46ed854595e40edcf3f8b37f9f14aa3f
+author Peter Zijlstra <[EMAIL PROTECTED]> 1159252259 -0700
+committer Linus Torvalds <[EMAIL PROTECTED]> 1159285724 -0700
+
+[PATCH] mm: optimize the new mprotect() code a bit
+
+mprotect() resets the page protections, which could result in extra write
+faults for those pages whose dirty state we track using write faults and are
+dirty already.
+
+Signed-off-by: Peter Zijlstra <[EMAIL PROTECTED]>
+Cc: Hugh Dickins <[EMAIL PROTECTED]>
+Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
+Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
+
+ mm/mprotect.c | 34 ++++++++++++++++++++++++----------
+ 1 file changed, 24 insertions(+), 10 deletions(-)
+
+diff --git a/mm/mprotect.c b/mm/mprotect.c
+index 367b7f6..955f9d0 100644
+--- a/mm/mprotect.c
++++ b/mm/mprotect.c
+@@ -27,7 +27,8 @@ #include <asm/cacheflush.h>
+ #include <asm/tlbflush.h>
+
+ static void change_pte_range(struct mm_struct *mm, pmd_t *pmd,
+- unsigned long addr, unsigned long end, pgprot_t newprot)
++ unsigned long addr, unsigned long end, pgprot_t newprot,
++ int dirty_accountable)
+ {
+ pte_t *pte, oldpte;
+ spinlock_t *ptl;
+@@ -42,7 +43,14 @@ static void change_pte_range(struct mm_s
+ * bits by wiping the pte and then setting the new pte
+ * into place.
+ */
+- ptent = pte_modify(ptep_get_and_clear(mm, addr, pte),
newprot);
++ ptent = ptep_get_and_clear(mm, addr, pte);
++ ptent = pte_modify(ptent, newprot);
++ /*
++ * Avoid taking write faults for pages we know to be
++ * dirty.
++ */
++ if (dirty_accountable && pte_dirty(ptent))
++ ptent = pte_mkwrite(ptent);
+ set_pte_at(mm, addr, pte, ptent);
+ lazy_mmu_prot_update(ptent);
+ #ifdef CONFIG_MIGRATION
+@@ -66,7 +74,8 @@ #endif
+ }
+
+ static inline void change_pmd_range(struct mm_struct *mm, pud_t *pud,
+- unsigned long addr, unsigned long end, pgprot_t newprot)
++ unsigned long addr, unsigned long end, pgprot_t newprot,
++ int dirty_accountable)
+ {
+ pmd_t *pmd;
+ unsigned long next;
+@@ -76,12 +85,13 @@ static inline void change_pmd_range(stru
+ next = pmd_addr_end(addr, end);
+ if (pmd_none_or_clear_bad(pmd))
+ continue;
+- change_pte_range(mm, pmd, addr, next, newprot);
++ change_pte_range(mm, pmd, addr, next, newprot,
dirty_accountable);
+ } while (pmd++, addr = next, addr != end);
+ }
+
+ static inline void change_pud_range(struct mm_struct *mm, pgd_t *pgd,
+- unsigned long addr, unsigned long end, pgprot_t newprot)
++ unsigned long addr, unsigned long end, pgprot_t newprot,
++ int dirty_accountable)
+ {
+ pud_t *pud;
+ unsigned long next;
+@@ -91,12 +101,13 @@ static inline void change_pud_range(stru
+ next = pud_addr_end(addr, end);
+ if (pud_none_or_clear_bad(pud))
+ continue;
+- change_pmd_range(mm, pud, addr, next, newprot);
++ change_pmd_range(mm, pud, addr, next, newprot,
dirty_accountable);
+ } while (pud++, addr = next, addr != end);
+ }
+
+ static void change_protection(struct vm_area_struct *vma,
+- unsigned long addr, unsigned long end, pgprot_t newprot)
++ unsigned long addr, unsigned long end, pgprot_t newprot,
++ int dirty_accountable)
+ {
+ struct mm_struct *mm = vma->vm_mm;
+ pgd_t *pgd;
+@@ -110,7 +121,7 @@ static void change_protection(struct vm_
+ next = pgd_addr_end(addr, end);
+ if (pgd_none_or_clear_bad(pgd))
+ continue;
+- change_pud_range(mm, pgd, addr, next, newprot);
++ change_pud_range(mm, pgd, addr, next, newprot,
dirty_accountable);
+ } while (pgd++, addr = next, addr != end);
+ flush_tlb_range(vma, start, end);
+ }
+@@ -125,6 +136,7 @@ mprotect_fixup(struct vm_area_struct *vm
+ unsigned long charged = 0;
+ pgoff_t pgoff;
+ int error;
++ int dirty_accountable = 0;
+
+ if (newflags == oldflags) {
+ *pprev = vma;
+@@ -181,14 +193,16 @@ success:
+ vma->vm_flags = newflags;
+ vma->vm_page_prot = protection_map[newflags &
+ (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)];
+- if (vma_wants_writenotify(vma))
++ if (vma_wants_writenotify(vma)) {
+ vma->vm_page_prot = protection_map[newflags &
+ (VM_READ|VM_WRITE|VM_EXEC)];
++ dirty_accountable = 1;
++ }
+
+ if (is_vm_hugetlb_page(vma))
+ hugetlb_change_protection(vma, start, end, vma->vm_page_prot);
+ else
+- change_protection(vma, start, end, vma->vm_page_prot);
++ change_protection(vma, start, end, vma->vm_page_prot,
dirty_accountable);
+ vm_stat_account(mm, oldflags, vma->vm_file, -nrpages);
+ vm_stat_account(mm, newflags, vma->vm_file, nrpages);
+ return 0;
Added:
dists/trunk/linux-2.6/debian/patches/features/mm-tracking-shared-dirty-pages.patch
==============================================================================
--- (empty file)
+++
dists/trunk/linux-2.6/debian/patches/features/mm-tracking-shared-dirty-pages.patch
Sat Nov 11 03:17:54 2006
@@ -0,0 +1,458 @@
+From [EMAIL PROTECTED] Tue Sep 26 20:23:25 2006
+Date: Tue, 26 Sep 2006 15:59:34 GMT
+Message-Id: <[EMAIL PROTECTED]>
+From: Linux Kernel Mailing List <[email protected]>
+To: [email protected]
+Subject: [PATCH] mm: tracking shared dirty pages
+
+commit d08b3851da41d0ee60851f2c75b118e1f7a5fc89
+tree a01f6930a1387e8f66607e2fe16c62bb7044353b
+parent 725d704ecaca4a43f067092c140d4f3271cf2856
+author Peter Zijlstra <[EMAIL PROTECTED]> 1159252257 -0700
+committer Linus Torvalds <[EMAIL PROTECTED]> 1159285724 -0700
+
+[PATCH] mm: tracking shared dirty pages
+
+Tracking of dirty pages in shared writeable mmap()s.
+
+The idea is simple: write protect clean shared writeable pages, catch the
+write-fault, make writeable and set dirty. On page write-back clean all the
+PTE dirty bits and write protect them once again.
+
+The implementation is a tad harder, mainly because the default
+backing_dev_info capabilities were too loosely maintained. Hence it is not
+enough to test the backing_dev_info for cap_account_dirty.
+
+The current heuristic is as follows, a VMA is eligible when:
+ - its shared writeable
+ (vm_flags & (VM_WRITE|VM_SHARED)) == (VM_WRITE|VM_SHARED)
+ - it is not a 'special' mapping
+ (vm_flags & (VM_PFNMAP|VM_INSERTPAGE)) == 0
+ - the backing_dev_info is cap_account_dirty
+ mapping_cap_account_dirty(vma->vm_file->f_mapping)
+ - f_op->mmap() didn't change the default page protection
+
+Page from remap_pfn_range() are explicitly excluded because their COW
+semantics are already horrid enough (see vm_normal_page() in do_wp_page()) and
+because they don't have a backing store anyway.
+
+mprotect() is taught about the new behaviour as well. However it overrides
+the last condition.
+
+Cleaning the pages on write-back is done with page_mkclean() a new rmap call.
+It can be called on any page, but is currently only implemented for mapped
+pages, if the page is found the be of a VMA that accounts dirty pages it will
+also wrprotect the PTE.
+
+Finally, in fs/buffers.c:try_to_free_buffers(); remove clear_page_dirty() from
+under ->private_lock. This seems to be safe, since ->private_lock is used to
+serialize access to the buffers, not the page itself. This is needed because
+clear_page_dirty() will call into page_mkclean() and would thereby violate
+locking order.
+
[EMAIL PROTECTED]: Provide a page_mkclean() implementation for NOMMU]
+Signed-off-by: Peter Zijlstra <[EMAIL PROTECTED]>
+Cc: Hugh Dickins <[EMAIL PROTECTED]>
+Signed-off-by: David Howells <[EMAIL PROTECTED]>
+Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
+Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
+
+ fs/buffer.c | 2 -
+ include/linux/mm.h | 34 ++++++++++++++++++++++++++
+ include/linux/rmap.h | 14 ++++++++++
+ mm/memory.c | 29 ++++++++++++++++++----
+ mm/mmap.c | 10 +++----
+ mm/mprotect.c | 21 ++++++----------
+ mm/page-writeback.c | 17 ++++++++++---
+ mm/rmap.c | 65
+++++++++++++++++++++++++++++++++++++++++++++++++++
+ 8 files changed, 162 insertions(+), 30 deletions(-)
+
+diff --git a/fs/buffer.c b/fs/buffer.c
+index 71649ef..3b6d701 100644
+--- a/fs/buffer.c
++++ b/fs/buffer.c
+@@ -2987,6 +2987,7 @@ int try_to_free_buffers(struct page *pag
+
+ spin_lock(&mapping->private_lock);
+ ret = drop_buffers(page, &buffers_to_free);
++ spin_unlock(&mapping->private_lock);
+ if (ret) {
+ /*
+ * If the filesystem writes its buffers by hand (eg ext3)
+@@ -2998,7 +2999,6 @@ int try_to_free_buffers(struct page *pag
+ */
+ clear_page_dirty(page);
+ }
+- spin_unlock(&mapping->private_lock);
+ out:
+ if (buffers_to_free) {
+ struct buffer_head *bh = buffers_to_free;
+diff --git a/include/linux/mm.h b/include/linux/mm.h
+index 7d20b25..4498414 100644
+--- a/include/linux/mm.h
++++ b/include/linux/mm.h
+@@ -15,6 +15,7 @@ #include <linux/prio_tree.h>
+ #include <linux/fs.h>
+ #include <linux/mutex.h>
+ #include <linux/debug_locks.h>
++#include <linux/backing-dev.h>
+
+ struct mempolicy;
+ struct anon_vma;
+@@ -810,6 +811,39 @@ struct shrinker;
+ extern struct shrinker *set_shrinker(int, shrinker_t);
+ extern void remove_shrinker(struct shrinker *shrinker);
+
++/*
++ * Some shared mappigns will want the pages marked read-only
++ * to track write events. If so, we'll downgrade vm_page_prot
++ * to the private version (using protection_map[] without the
++ * VM_SHARED bit).
++ */
++static inline int vma_wants_writenotify(struct vm_area_struct *vma)
++{
++ unsigned int vm_flags = vma->vm_flags;
++
++ /* If it was private or non-writable, the write bit is already clear */
++ if ((vm_flags & (VM_WRITE|VM_SHARED)) != ((VM_WRITE|VM_SHARED)))
++ return 0;
++
++ /* The backer wishes to know when pages are first written to? */
++ if (vma->vm_ops && vma->vm_ops->page_mkwrite)
++ return 1;
++
++ /* The open routine did something to the protections already? */
++ if (pgprot_val(vma->vm_page_prot) !=
++ pgprot_val(protection_map[vm_flags &
++ (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)]))
++ return 0;
++
++ /* Specialty mapping? */
++ if (vm_flags & (VM_PFNMAP|VM_INSERTPAGE))
++ return 0;
++
++ /* Can the mapping track the dirty pages? */
++ return vma->vm_file && vma->vm_file->f_mapping &&
++ mapping_cap_account_dirty(vma->vm_file->f_mapping);
++}
++
+ extern pte_t *FASTCALL(get_locked_pte(struct mm_struct *mm, unsigned long
addr, spinlock_t **ptl));
+
+ int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address);
+diff --git a/include/linux/rmap.h b/include/linux/rmap.h
+index bf97b09..db2c1df 100644
+--- a/include/linux/rmap.h
++++ b/include/linux/rmap.h
+@@ -103,6 +103,14 @@ pte_t *page_check_address(struct page *,
+ */
+ unsigned long page_address_in_vma(struct page *, struct vm_area_struct *);
+
++/*
++ * Cleans the PTEs of shared mappings.
++ * (and since clean PTEs should also be readonly, write protects them too)
++ *
++ * returns the number of cleaned PTEs.
++ */
++int page_mkclean(struct page *);
++
+ #else /* !CONFIG_MMU */
+
+ #define anon_vma_init() do {} while (0)
+@@ -112,6 +120,12 @@ #define anon_vma_link(vma) do {} while (
+ #define page_referenced(page,l) TestClearPageReferenced(page)
+ #define try_to_unmap(page, refs) SWAP_FAIL
+
++static inline int page_mkclean(struct page *page)
++{
++ return 0;
++}
++
++
+ #endif /* CONFIG_MMU */
+
+ /*
+diff --git a/mm/memory.c b/mm/memory.c
+index 109e986..fa941b1 100644
+--- a/mm/memory.c
++++ b/mm/memory.c
+@@ -1458,14 +1458,19 @@ static int do_wp_page(struct mm_struct *
+ {
+ struct page *old_page, *new_page;
+ pte_t entry;
+- int reuse, ret = VM_FAULT_MINOR;
++ int reuse = 0, ret = VM_FAULT_MINOR;
++ struct page *dirty_page = NULL;
+
+ old_page = vm_normal_page(vma, address, orig_pte);
+ if (!old_page)
+ goto gotten;
+
+- if (unlikely((vma->vm_flags & (VM_SHARED|VM_WRITE)) ==
+- (VM_SHARED|VM_WRITE))) {
++ /*
++ * Only catch write-faults on shared writable pages, read-only
++ * shared pages can get COWed by get_user_pages(.write=1, .force=1).
++ */
++ if (unlikely((vma->vm_flags & (VM_WRITE|VM_SHARED)) ==
++ (VM_WRITE|VM_SHARED))) {
+ if (vma->vm_ops && vma->vm_ops->page_mkwrite) {
+ /*
+ * Notify the address space that the page is about to
+@@ -1494,13 +1499,12 @@ static int do_wp_page(struct mm_struct *
+ if (!pte_same(*page_table, orig_pte))
+ goto unlock;
+ }
+-
++ dirty_page = old_page;
++ get_page(dirty_page);
+ reuse = 1;
+ } else if (PageAnon(old_page) && !TestSetPageLocked(old_page)) {
+ reuse = can_share_swap_page(old_page);
+ unlock_page(old_page);
+- } else {
+- reuse = 0;
+ }
+
+ if (reuse) {
+@@ -1566,6 +1570,10 @@ gotten:
+ page_cache_release(old_page);
+ unlock:
+ pte_unmap_unlock(page_table, ptl);
++ if (dirty_page) {
++ set_page_dirty(dirty_page);
++ put_page(dirty_page);
++ }
+ return ret;
+ oom:
+ if (old_page)
+@@ -2098,6 +2106,7 @@ static int do_no_page(struct mm_struct *
+ unsigned int sequence = 0;
+ int ret = VM_FAULT_MINOR;
+ int anon = 0;
++ struct page *dirty_page = NULL;
+
+ pte_unmap(page_table);
+ BUG_ON(vma->vm_flags & VM_PFNMAP);
+@@ -2192,6 +2201,10 @@ retry:
+ } else {
+ inc_mm_counter(mm, file_rss);
+ page_add_file_rmap(new_page);
++ if (write_access) {
++ dirty_page = new_page;
++ get_page(dirty_page);
++ }
+ }
+ } else {
+ /* One of our sibling threads was faster, back out. */
+@@ -2204,6 +2217,10 @@ retry:
+ lazy_mmu_prot_update(entry);
+ unlock:
+ pte_unmap_unlock(page_table, ptl);
++ if (dirty_page) {
++ set_page_dirty(dirty_page);
++ put_page(dirty_page);
++ }
+ return ret;
+ oom:
+ page_cache_release(new_page);
+diff --git a/mm/mmap.c b/mm/mmap.c
+index d799d89..8507ee9 100644
+--- a/mm/mmap.c
++++ b/mm/mmap.c
+@@ -1105,12 +1105,6 @@ munmap_back:
+ goto free_vma;
+ }
+
+- /* Don't make the VMA automatically writable if it's shared, but the
+- * backer wishes to know when pages are first written to */
+- if (vma->vm_ops && vma->vm_ops->page_mkwrite)
+- vma->vm_page_prot =
+- protection_map[vm_flags & (VM_READ|VM_WRITE|VM_EXEC)];
+-
+ /* We set VM_ACCOUNT in a shared mapping's vm_flags, to inform
+ * shmem_zero_setup (perhaps called through /dev/zero's ->mmap)
+ * that memory reservation must be checked; but that reservation
+@@ -1128,6 +1122,10 @@ munmap_back:
+ pgoff = vma->vm_pgoff;
+ vm_flags = vma->vm_flags;
+
++ if (vma_wants_writenotify(vma))
++ vma->vm_page_prot =
++ protection_map[vm_flags & (VM_READ|VM_WRITE|VM_EXEC)];
++
+ if (!file || !vma_merge(mm, prev, addr, vma->vm_end,
+ vma->vm_flags, NULL, file, pgoff, vma_policy(vma))) {
+ file = vma->vm_file;
+diff --git a/mm/mprotect.c b/mm/mprotect.c
+index 638edab..367b7f6 100644
+--- a/mm/mprotect.c
++++ b/mm/mprotect.c
+@@ -123,8 +123,6 @@ mprotect_fixup(struct vm_area_struct *vm
+ unsigned long oldflags = vma->vm_flags;
+ long nrpages = (end - start) >> PAGE_SHIFT;
+ unsigned long charged = 0;
+- unsigned int mask;
+- pgprot_t newprot;
+ pgoff_t pgoff;
+ int error;
+
+@@ -176,24 +174,21 @@ mprotect_fixup(struct vm_area_struct *vm
+ }
+
+ success:
+- /* Don't make the VMA automatically writable if it's shared, but the
+- * backer wishes to know when pages are first written to */
+- mask = VM_READ|VM_WRITE|VM_EXEC|VM_SHARED;
+- if (vma->vm_ops && vma->vm_ops->page_mkwrite)
+- mask &= ~VM_SHARED;
+-
+- newprot = protection_map[newflags & mask];
+-
+ /*
+ * vm_flags and vm_page_prot are protected by the mmap_sem
+ * held in write mode.
+ */
+ vma->vm_flags = newflags;
+- vma->vm_page_prot = newprot;
++ vma->vm_page_prot = protection_map[newflags &
++ (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)];
++ if (vma_wants_writenotify(vma))
++ vma->vm_page_prot = protection_map[newflags &
++ (VM_READ|VM_WRITE|VM_EXEC)];
++
+ if (is_vm_hugetlb_page(vma))
+- hugetlb_change_protection(vma, start, end, newprot);
++ hugetlb_change_protection(vma, start, end, vma->vm_page_prot);
+ else
+- change_protection(vma, start, end, newprot);
++ change_protection(vma, start, end, vma->vm_page_prot);
+ vm_stat_account(mm, oldflags, vma->vm_file, -nrpages);
+ vm_stat_account(mm, newflags, vma->vm_file, nrpages);
+ return 0;
+diff --git a/mm/page-writeback.c b/mm/page-writeback.c
+index 77a0bc4..1c87430 100644
+--- a/mm/page-writeback.c
++++ b/mm/page-writeback.c
+@@ -23,6 +23,7 @@ #include <linux/init.h>
+ #include <linux/backing-dev.h>
+ #include <linux/blkdev.h>
+ #include <linux/mpage.h>
++#include <linux/rmap.h>
+ #include <linux/percpu.h>
+ #include <linux/notifier.h>
+ #include <linux/smp.h>
+@@ -550,7 +551,7 @@ int do_writepages(struct address_space *
+ return 0;
+ wbc->for_writepages = 1;
+ if (mapping->a_ops->writepages)
+- ret = mapping->a_ops->writepages(mapping, wbc);
++ ret = mapping->a_ops->writepages(mapping, wbc);
+ else
+ ret = generic_writepages(mapping, wbc);
+ wbc->for_writepages = 0;
+@@ -712,9 +713,15 @@ int test_clear_page_dirty(struct page *p
+ radix_tree_tag_clear(&mapping->page_tree,
+ page_index(page),
+ PAGECACHE_TAG_DIRTY);
+- if (mapping_cap_account_dirty(mapping))
+- __dec_zone_page_state(page, NR_FILE_DIRTY);
+ write_unlock_irqrestore(&mapping->tree_lock, flags);
++ /*
++ * We can continue to use `mapping' here because the
++ * page is locked, which pins the address_space
++ */
++ if (mapping_cap_account_dirty(mapping)) {
++ page_mkclean(page);
++ dec_zone_page_state(page, NR_FILE_DIRTY);
++ }
+ return 1;
+ }
+ write_unlock_irqrestore(&mapping->tree_lock, flags);
+@@ -744,8 +751,10 @@ int clear_page_dirty_for_io(struct page
+
+ if (mapping) {
+ if (TestClearPageDirty(page)) {
+- if (mapping_cap_account_dirty(mapping))
++ if (mapping_cap_account_dirty(mapping)) {
++ page_mkclean(page);
+ dec_zone_page_state(page, NR_FILE_DIRTY);
++ }
+ return 1;
+ }
+ return 0;
+diff --git a/mm/rmap.c b/mm/rmap.c
+index 40158b5..e2155d7 100644
+--- a/mm/rmap.c
++++ b/mm/rmap.c
+@@ -434,6 +434,71 @@ int page_referenced(struct page *page, i
+ return referenced;
+ }
+
++static int page_mkclean_one(struct page *page, struct vm_area_struct *vma)
++{
++ struct mm_struct *mm = vma->vm_mm;
++ unsigned long address;
++ pte_t *pte, entry;
++ spinlock_t *ptl;
++ int ret = 0;
++
++ address = vma_address(page, vma);
++ if (address == -EFAULT)
++ goto out;
++
++ pte = page_check_address(page, mm, address, &ptl);
++ if (!pte)
++ goto out;
++
++ if (!pte_dirty(*pte) && !pte_write(*pte))
++ goto unlock;
++
++ entry = ptep_get_and_clear(mm, address, pte);
++ entry = pte_mkclean(entry);
++ entry = pte_wrprotect(entry);
++ ptep_establish(vma, address, pte, entry);
++ lazy_mmu_prot_update(entry);
++ ret = 1;
++
++unlock:
++ pte_unmap_unlock(pte, ptl);
++out:
++ return ret;
++}
++
++static int page_mkclean_file(struct address_space *mapping, struct page *page)
++{
++ pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT);
++ struct vm_area_struct *vma;
++ struct prio_tree_iter iter;
++ int ret = 0;
++
++ BUG_ON(PageAnon(page));
++
++ spin_lock(&mapping->i_mmap_lock);
++ vma_prio_tree_foreach(vma, &iter, &mapping->i_mmap, pgoff, pgoff) {
++ if (vma->vm_flags & VM_SHARED)
++ ret += page_mkclean_one(page, vma);
++ }
++ spin_unlock(&mapping->i_mmap_lock);
++ return ret;
++}
++
++int page_mkclean(struct page *page)
++{
++ int ret = 0;
++
++ BUG_ON(!PageLocked(page));
++
++ if (page_mapped(page)) {
++ struct address_space *mapping = page_mapping(page);
++ if (mapping)
++ ret = page_mkclean_file(mapping, page);
++ }
++
++ return ret;
++}
++
+ /**
+ * page_set_anon_rmap - setup new anonymous rmap
+ * @page: the page to add the mapping to
Modified: dists/trunk/linux-2.6/debian/patches/series/6
==============================================================================
--- dists/trunk/linux-2.6/debian/patches/series/6 (original)
+++ dists/trunk/linux-2.6/debian/patches/series/6 Sat Nov 11 03:17:54 2006
@@ -1,2 +1,8 @@
+ features/alpha/titan-video.patch
+ bugfix/alpha/srm-env-fixes.patch
++ features/mm-tracking-shared-dirty-pages.patch
++ features/mm-balance-dirty-pages.patch
++ features/mm-optimize-mprotect.patch
++ features/mm-install_page-cleanup.patch
++ features/mm-do_wp_page-fixup.patch
++ features/mm-msync-cleanup.patch
_______________________________________________
Kernel-svn-changes mailing list
[email protected]
http://lists.alioth.debian.org/mailman/listinfo/kernel-svn-changes
