as there isn't any strong argument to mandate
a new vm_flag.
Signed-off-by: Michel Lespinasse wal...@google.com
Signed-off-by: Hugh Dickins hu...@google.com
---
Andrew has taken this patch into his tree, but remarked that he is
away from keyboard until the end of next week: though not a serious
matter, I
On Fri, 29 Mar 2013, Minchan Kim wrote:
On Thu, Mar 28, 2013 at 11:19:12AM -0700, Dan Magenheimer wrote:
From: Minchan Kim [mailto:minc...@kernel.org]
On Wed, Mar 27, 2013 at 03:24:00PM -0700, Dan Magenheimer wrote:
From: Hugh Dickins [mailto:hu...@google.com]
Subject: Re: [RFC
On Tue, 2 Apr 2013, Minchan Kim wrote:
On Fri, Mar 29, 2013 at 01:01:14PM -0700, Hugh Dickins wrote:
On Fri, 29 Mar 2013, Minchan Kim wrote:
On Thu, Mar 28, 2013 at 11:19:12AM -0700, Dan Magenheimer wrote:
I wonder if something like this would have a similar result for zram
On Tue, 2 Apr 2013, Minchan Kim wrote:
On Mon, Apr 01, 2013 at 04:35:38PM -0700, David Rientjes wrote:
On Mon, 1 Apr 2013, Minchan Kim wrote:
__do_huge_pmd_anonymous_page depends on page_add_new_anon_rmap's
spinlock for making sure that clear_huge_page write become visible
after set
On Tue, 2 Apr 2013, Kirill A. Shutemov wrote:
Kirill A. Shutemov wrote:
From: Kirill A. Shutemov kirill.shute...@linux.intel.com
ramfs is the most simple fs from page cache point of view. Let's start
transparent huge page cache enabling here.
For now we allocate only non-movable
On Wed, 20 Mar 2013, Eduardo Cruz wrote:
Hello.
I'm trying to remap some kernel static memory to user space using
remap_pfn_range.
For that, I wrote a module that initializes a device, which later I
use mknod, etc.
When I allocate the memory with kmalloc, everything works: (where
On Tue, 26 Mar 2013, Toralf Foerster wrote:
On 03/25/2013 11:53 PM, Andrew Morton wrote:
On Fri, 22 Mar 2013 18:28:36 +0100 Toralf Foerster toralf.foers...@gmx.de
wrote:
Using trinity I often trigger under a user mode linux image with host
kernel 3.8.4
and guest kernel
Michel, I propose that we revert 3.9-rc1's VM_POPULATE flag - 186930500985
mm: introduce VM_POPULATE flag to better deal with racy userspace programs.
Konstantin's 3.7 cleanup of VM_flags has left several bits below 32
free, but sooner or later someone will want to come through again and
free
or SWP_SOLIDSTATE easily(ie, actually, zram is already done) but
I have no idea to use it for frontswap.
Any idea?
Other optimize point is we remove it unconditionally when we
found it's exclusive when swap in happen.
It could help frontswap family, too.
What do you think about it?
Cc: Hugh
On Wed, 27 Mar 2013, Dan Magenheimer wrote:
From: Hugh Dickins [mailto:hu...@google.com]
Subject: Re: [RFC] mm: remove swapcache page early
On Wed, 27 Mar 2013, Minchan Kim wrote:
Swap subsystem does lazy swap slot free with expecting the page
would be swapped out again so we
On Fri, 8 Mar 2013, Joonsoo Kim wrote:
On Thu, Mar 07, 2013 at 10:54:15AM -0800, Hugh Dickins wrote:
On Thu, 7 Mar 2013, Joonsoo Kim wrote:
When we found that the flag has a bit of PAGE_FLAGS_CHECK_AT_PREP,
we reset the flag. If we always reset the flag, we can reduce one
branch
away without it so far, so fix the build in mm/ksm.c.
Reported-by: Geert Uytterhoeven ge...@linux-m68k.org
Signed-off-by: Hugh Dickins hu...@google.com
---
mm/ksm.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- 3.9-rc1/mm/ksm.c2013-03-03 19:35:40.120006587 -0800
+++ linux/mm
arch/mips/include/asm/mmzone.h for example).
Or perhaps it is only expected when CONFIG_NUMA=y: too much of a maze,
and m68k got away without it so far, so fix the build in mm/ksm.c.
Reported-by: Geert Uytterhoeven ge...@linux-m68k.org
Signed-off-by: Hugh Dickins hu...@google.com
---
Sorry, the non
On Mon, 4 Mar 2013, Will Huck wrote:
Could you explain me why shmem has more relationship with mempolicy? It seems
that there are many codes in shmem handle mempolicy, but other components in
mm subsystem just have little.
NUMA mempolicy is mostly handled in mm/mempolicy.c, which services
On Wed, 6 Mar 2013, Will Huck wrote:
How ksm treat a ksm forked page? IIUC, it's not merged in ksm stable tree. It
will just be ignore?
No, it's there in the stable tree, as it was before it got forked. And
when ksmd comes around to find the new mm, it will allocate an rmap_item
for that
On Wed, 6 Mar 2013, Ric Mason wrote:
[ I've deleted the context because that was about the unstable tree,
and here you have moved to asking about a case in the stable tree. ]
For the case of a ksm page is migrated to a different NUMA node and migrate
its stable node to the right tree and
On Thu, 7 Mar 2013, Shaohua Li wrote:
On Wed, Mar 06, 2013 at 11:05:04PM -0500, CAI Qian wrote:
Bisecting indicated that this commit,
1998cc048901109a29924380b8e91bc049b32951
mm: make madvise(MADV_WILLNEED) support swap file prefetch
Caused an LTP test failure,
http://goo.gl/1FVPy
On Thu, 7 Mar 2013, Joonsoo Kim wrote:
When we found that the flag has a bit of PAGE_FLAGS_CHECK_AT_PREP,
we reset the flag. If we always reset the flag, we can reduce one
branch operation. So remove it.
Cc: Hugh Dickins hu...@google.com
Signed-off-by: Joonsoo Kim iamjoonsoo@lge.com
I
On Thu, 29 Nov 2012, Andrew Morton wrote:
On Wed, 28 Nov 2012 17:22:03 -0800 (PST)
Hugh Dickins hu...@google.com wrote:
+/*
+ * llseek SEEK_DATA or SEEK_HOLE through the radix_tree.
+ */
+static pgoff_t shmem_seek_hole_data(struct address_space *mapping
shmem_alloc_page() went
on expecting alloc_page_vma() to drop the refcount it had acquired.
This deserves a rework: but for now fix the leak in shmem_alloc_page().
Reported-by: Tommi Rantala tt.rant...@gmail.com
Awaiting-Signed-off-by: Mel Gorman mgor...@suse.de
Signed-off-by: Hugh Dickins hu...@google.com
Cc
On Tue, 4 Dec 2012, Hugh Dickins wrote:
Yes, your patch fixes it Mel, but I prefer it as below, with a couple
of mods: removing the no longer true comment, and leaving shmem_swapin()
alone with just a comment. It appears to be the job of the rather weird
mpol_cond_copy() to drop
...@suse.de
Signed-off-by: Hugh Dickins hu...@google.com
Cc: sta...@vger.kernel.org
---
include/linux/mempolicy.h | 16
mm/mempolicy.c| 22 --
mm/shmem.c| 26 --
3 files changed, 16 insertions(+), 48
On Tue, 5 Feb 2013, Mel Gorman wrote:
On Fri, Jan 25, 2013 at 05:54:53PM -0800, Hugh Dickins wrote:
From: Petr Holasek phola...@redhat.com
Introduces new sysfs boolean knob /sys/kernel/mm/ksm/merge_across_nodes
which control merging pages across different numa nodes.
When it is set
On Tue, 5 Feb 2013, Mel Gorman wrote:
On Fri, Jan 25, 2013 at 05:59:35PM -0800, Hugh Dickins wrote:
Memory hotremove's ksm_check_stable_tree() is pitifully inefficient
(restarting whenever it finds a stale node to remove), but rearrange
so that at least it does not needlessly restart from
On Tue, 5 Feb 2013, Mel Gorman wrote:
On Fri, Jan 25, 2013 at 06:00:50PM -0800, Hugh Dickins wrote:
In some places where get_ksm_page() is used, we need the page to be locked.
When KSM migration is fully enabled, we shall want that to make sure that
the page just acquired cannot
On Tue, 5 Feb 2013, Mel Gorman wrote:
On Fri, Jan 25, 2013 at 06:01:59PM -0800, Hugh Dickins wrote:
Switching merge_across_nodes after running KSM is liable to oops on stale
nodes still left over from the previous stable tree. It's not something
that people will often want to do
, 5 Feb 2013, Mel Gorman wrote:
On Fri, Jan 25, 2013 at 06:03:31PM -0800, Hugh Dickins wrote:
KSM page migration is already supported in the case of memory hotremove,
which takes the ksm_thread_mutex across all its migrations to keep life
simple.
But the new KSM NUMA merge_across_nodes
On Fri, 8 Feb 2013, Gerald Schaefer wrote:
On Fri, 25 Jan 2013 18:10:18 -0800 (PST)
Hugh Dickins hu...@google.com wrote:
Complaints are rare, but lockdep still does not understand the way
ksm_memory_callback(MEM_GOING_OFFLINE) takes ksm_thread_mutex, and
holds it until
On Tue, 12 Feb 2013, Dave Jones wrote:
My Thinkpad T430s suspend/resumes fine most of the time. But every so often
(like one in ten times or so), as soon as I suspend, I get a black screen,
and a blinking power button.
(Note: Not the capslock lights like when we panic, this laptop
On Tue, 12 Feb 2013, Dave Jones wrote:
On Tue, Feb 12, 2013 at 04:26:22PM -0800, Hugh Dickins wrote:
On Tue, 12 Feb 2013, Dave Jones wrote:
My Thinkpad T430s suspend/resumes fine most of the time. But every so
often
(like one in ten times or so), as soon as I suspend, I get
On Tue, 12 Feb 2013, Dave Jones wrote:
On Tue, Feb 12, 2013 at 04:56:55PM -0800, Hugh Dickins wrote:
so I can hit this pretty quickly with this..
while [ 1 ];
do
rtcwake -s 5 -m no ; pm-suspend
done
Which should make it bisectable at least..
Thanks
On Thu, 31 Jan 2013, Minchan Kim wrote:
When I reviewed zswap, I was curious about frontswap_store.
It said following as.
* If frontswap already contains a page with matching swaptype and
* offset, the frontswap implementation may either overwrite the data and
* return success or
-by: Hugh Dickins hu...@google.com
---
mm/shmem.c | 25 -
1 file changed, 12 insertions(+), 13 deletions(-)
diff --git a/mm/shmem.c b/mm/shmem.c
index a368a1c..c5dc8ae 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -336,19 +336,19 @@ static unsigned
On Sat, 2 Feb 2013, Konstantin Khlebnikov wrote:
Johannes Weiner wrote:
In shmem_find_get_pages_and_swap, use the faster radix tree iterator
construct from 78c1d78 radix-tree: introduce bit-optimized iterator.
Signed-off-by: Johannes Weinerhan...@cmpxchg.org
Hmm, ACK.
-off-by: Hugh Dickins hu...@google.com
---
mm/memcontrol.c |4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- 3.8-rc6/mm/memcontrol.c 2012-12-22 09:43:27.628015582 -0800
+++ linux/mm/memcontrol.c 2013-02-02 16:56:06.188325771 -0800
@@ -4969,6 +4969,7 @@ out:
return
On Wed, 30 Jan 2013, Shaohua Li wrote:
On Sun, Jan 27, 2013 at 01:40:40PM -0800, Hugh Dickins wrote:
I'm glad Minchan has now pointed you to Rik's posting of two years ago:
I think there are more important changes to be made in that direction.
Not sure how others use multiple swaps
Convert tmpfs do_shmem_file_read() to shmem_file_read_iter().
Make file_read_iter_actor() global so tmpfs can use it too: delete
file_read_actor(), which was made global in 2.4.4 for use by tmpfs.
Replace tmpfs generic_file_aio_write() by generic_file_write_iter().
Signed-off-by: Hugh Dickins hu
On Wed, 6 Feb 2013, Jan Kara wrote:
On Wed 06-02-13 09:58:48, David Rientjes wrote:
On Wed, 6 Feb 2013, Jan Kara wrote:
Yes, I noticed that thread just yesterday and also though that using
similar trick might be viable. I'll experiment if we could use the same
method for handling
this unhelpful and suggested a rename of page_xchg_last_nid to
keep with a verb_struct_field naming pattern.
This patch replaces mm-rename-page-struct-field-helpers.patch.
Suggested-by: Hugh Dickins hu...@google.com
Signed-off-by: Mel Gorman mgor...@suse.de
FWIW looks just right to me (I don't think
On Tue, 29 Jan 2013, Kirill A. Shutemov wrote:
Hugh Dickins wrote:
On Mon, 28 Jan 2013, Kirill A. Shutemov wrote:
From: Kirill A. Shutemov kirill.shute...@linux.intel.com
Here's first steps towards huge pages in page cache.
The intend of the work is get code ready to enable
On Wed, 30 Jan 2013, Michel Lespinasse wrote:
This change adds a page_mask argument to follow_page.
follow_page sets *page_mask to HPAGE_PMD_NR - 1 when it encounters a THP page,
and to 0 in other cases.
__get_user_pages() makes use of this in order to accelerate populating
THP ranges -
On Sat, 2 Feb 2013, Randy Dunlap wrote:
On 02/02/13 15:11, Tejun Heo wrote:
On Sat, Feb 02, 2013 at 03:10:48PM -0800, Tejun Heo wrote:
Fix it by ensuring proceeding to the next slot doesn't carry over the
unaligned offset - ie. use round_up(id + 1, slot_distance) instead of
id +=
On Fri, 1 Mar 2013, Ric Mason wrote:
I think the ksm implementation for num awareness is buggy.
Sorry, I just don't understand your comments below,
but will try to answer or question them as best I can.
For page migratyion stuff, new page is allocated from node *which page is
migrated
On Fri, 1 Mar 2013, Simon Jeons wrote:
On 03/01/2013 05:22 PM, Simon Jeons wrote:
On 02/23/2013 01:56 AM, Johannes Weiner wrote:
Mapped file pages have to get scanned twice before they are reclaimed
because we don't have enough usage information after the first scan.
It seems that
On Sat, 2 Mar 2013, Simon Jeons wrote:
In function __add_to_swap_cache if add to radix tree successfully will result
in increase NR_FILE_PAGES, why? This is anonymous page instead of file backed
page.
Right, that's hard to understand without historical background.
I think the quick answer
On Sat, 2 Mar 2013, Ric Mason wrote:
On 03/02/2013 04:03 AM, Hugh Dickins wrote:
On Fri, 1 Mar 2013, Ric Mason wrote:
I think the ksm implementation for num awareness is buggy.
Sorry, I just don't understand your comments below,
but will try to answer or question them as best I can
On Sat, 2 Mar 2013, Simon Jeons wrote:
On 03/02/2013 09:42 AM, Hugh Dickins wrote:
On Sat, 2 Mar 2013, Simon Jeons wrote:
In function __add_to_swap_cache if add to radix tree successfully will
result
in increase NR_FILE_PAGES, why? This is anonymous page instead of file
backed
Here's a KSM series, based on mmotm 2013-01-23-17-04: starting with
Petr's v7 KSM: numa awareness sysfs knob; then fixing the two issues
we had with that, fully enabling KSM page migration on the way.
(A different kind of KSM/NUMA issue which I've certainly not begun to
address here: when KSM
nodes still left over from the previous stable tree;
2) memory hotremove may migrate KSM pages, but there is no provision
here for !merge_across_nodes to migrate nodes to the proper tree.
Signed-off-by: Petr Holasek phola...@redhat.com
Signed-off-by: Hugh Dickins hu...@google.com
Acked-by: Rik van
From: Petr Holasek phola...@redhat.com
This patch adds sysfs documentation for Kernel Samepage Merging (KSM)
including new merge_across_nodes knob.
Signed-off-by: Petr Holasek phola...@redhat.com
Signed-off-by: Hugh Dickins hu...@google.com
---
Documentation/ABI/testing/sysfs-kernel-mm-ksm
.
Signed-off-by: Hugh Dickins hu...@google.com
---
mm/ksm.c | 48 ++--
1 file changed, 22 insertions(+), 26 deletions(-)
--- mmotm.orig/mm/ksm.c 2013-01-25 14:36:38.608205618 -0800
+++ mmotm/mm/ksm.c 2013-01-25 14:36:52.152205940 -0800
@@ -41,6 +41,14
Memory hotremove's ksm_check_stable_tree() is pitifully inefficient
(restarting whenever it finds a stale node to remove), but rearrange
so that at least it does not needlessly restart from nid 0 each time.
And add a couple of comments: here is why we keep pfn instead of page.
Signed-off-by: Hugh
for it. There's no need for rcu_read_lock() around
get_page_unless_zero() (and mapping checks) here. Cut out that
silliness before making this any harder to understand.
Signed-off-by: Hugh Dickins hu...@google.com
---
mm/ksm.c | 23 +--
1 file changed, 13 insertions(+), 10 deletions
it then marks Uptodate.
Fix this case by not copying, letting do_swap_page() discover the error.
Signed-off-by: Hugh Dickins hu...@google.com
---
include/linux/ksm.h | 18 ++---
mm/ksm.c| 83 +++---
mm/memory.c | 19 -
3 files changed
heavy hammer of move_vma()'s call to ksm_madvise(,,,MADV_UNMERGEABLE,).
Signed-off-by: Hugh Dickins hu...@google.com
---
mm/ksm.c | 94 ++---
mm/migrate.c |5 ++
2 files changed, 77 insertions(+), 22 deletions(-)
--- mmotm.orig/mm/ksm.c 2013
of
stale entries from time to time (scan_get_next_rmap_item() does it once
each full scan): whereas stale nodes in the stable tree get naturally
pruned as searches try to brush past them, these migrate_nodes may get
forgotten and accumulate.
Signed-off-by: Hugh Dickins hu...@google.com
---
mm/ksm.c
MADV_MERGEABLE on
any area where this is a worry.
Signed-off-by: Hugh Dickins hu...@google.com
---
mm/mempolicy.c |3 +--
mm/migrate.c | 21 +++--
2 files changed, 4 insertions(+), 20 deletions(-)
--- mmotm.orig/mm/mempolicy.c 2013-01-24 12:28:38.848127553 -0800
+++ mmotm/mm
No functional change, but the only purpose of the offlining argument
to migrate_pages() etc, was to ensure that __unmap_and_move() could
migrate a KSM page for memory hotremove (which took ksm_thread_mutex)
but not for other callers. Now all cases are safe, remove the arg.
Signed-off-by: Hugh
, and wait_while_offlining()
checks, to achieve the same lockout without being caught by lockdep.
This is less elegant for KSM, but it's more important to keep lockdep
useful to other users - and I apologize for how long it took to fix.
Reported-by: Gerald Schaefer gerald.schae...@de.ibm.com
Signed-off-by: Hugh
On Fri, 25 Jan 2013, Shaohua Li wrote:
On Thu, Jan 24, 2013 at 10:45:57PM -0500, Sasha Levin wrote:
Hi folks,
Commit swap: make each swap partition have one address_space is triggering
a series of warnings on boot:
[3.446071] [ cut here ]
[3.446664]
On Sat, 26 Jan 2013, Simon Jeons wrote:
On Fri, 2013-01-25 at 17:54 -0800, Hugh Dickins wrote:
From: Petr Holasek phola...@redhat.com
@@ -1122,6 +1166,18 @@ struct rmap_item *unstable_tree_search_i
return NULL
On Tue, 22 Jan 2013, Mel Gorman wrote:
From: Hugh Dickins hu...@google.com
When correcting commit 04fa5d6a (mm: migrate: check page_count of
THP before migrating) Hugh Dickins noted that the control flow for
transhuge migration was difficult to follow. Unconditionally calling
put_page
On Sun, 27 Jan 2013, Shaohua Li wrote:
On Sat, Jan 26, 2013 at 06:16:05PM -0800, Hugh Dickins wrote:
On Fri, 25 Jan 2013, Shaohua Li wrote:
On Thu, Jan 24, 2013 at 10:45:57PM -0500, Sasha Levin wrote:
Subject: give-each-swapper-space-separate-backing_dev_info
I had all cpus spinning in swap_info_get(), for the lock on an area
being swapped off: probably because get_swap_page() forgot to unlock.
Signed-off-by: Hugh Dickins hu...@google.com
---
mm/swapfile.c |5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
--- mmotm.orig/mm/swapfile.c
On Sat, 26 Jan 2013, Simon Jeons wrote:
On Sat, 2013-01-26 at 18:54 -0800, Hugh Dickins wrote:
So you'd like us to add code for moving a node from one tree to another
in ksm_migrate_page() (and what would it do when it collides with an
Without numa awareness, I still can't understand
On Sat, 26 Jan 2013, Simon Jeons wrote:
On Fri, 2013-01-25 at 18:00 -0800, Hugh Dickins wrote:
In some places where get_ksm_page() is used, we need the page to be locked.
In function get_ksm_page, why check page-mapping =
get_page_unless_zero = check page-mapping instead
On Sat, 26 Jan 2013, Simon Jeons wrote:
BTW, what's the meaning of ksm page forked?
A ksm page is mapped into a process's mm, then that process calls fork():
the ksm page then appears in the child's mm, before ksmd has tracked it.
--
To unsubscribe from this list: send the line unsubscribe
On Sat, 26 Jan 2013, Simon Jeons wrote:
On Fri, 2013-01-25 at 18:01 -0800, Hugh Dickins wrote:
Switching merge_across_nodes after running KSM is liable to oops on stale
nodes still left over from the previous stable tree. It's not something
that people will often want to do, but it would
On Sat, 26 Jan 2013, Simon Jeons wrote:
On Fri, 2013-01-25 at 18:03 -0800, Hugh Dickins wrote:
+ while (!get_page_unless_zero(page)) {
+ /*
+* Another check for page-mapping != expected_mapping would
+* work here too. We have chosen the !PageSwapCache
On Sun, 27 Jan 2013, Simon Jeons wrote:
On Fri, 2013-01-25 at 18:05 -0800, Hugh Dickins wrote:
@@ -1344,10 +1401,29 @@ static void cmp_and_merge_page(struct pa
unsigned int checksum;
int err;
- remove_rmap_item_from_tree(rmap_item);
+ stable_node = page_stable_node(page
On Sun, 27 Jan 2013, Simon Jeons wrote:
On Fri, 2013-01-25 at 18:10 -0800, Hugh Dickins wrote:
@@ -2098,15 +2117,15 @@ static int ksm_memory_callback(struct no
switch (action) {
case MEM_GOING_OFFLINE:
/*
-* Keep it very simple for now: just lock out ksmd
On Sun, 27 Jan 2013, Simon Jeons wrote:
On Sun, 2013-01-27 at 14:08 -0800, Hugh Dickins wrote:
On Sat, 26 Jan 2013, Simon Jeons wrote:
Why the parameter lock passed from stable_tree_search/insert is true,
but remove_rmap_item_from_tree is false?
The other way round
On Sun, 27 Jan 2013, Simon Jeons wrote:
On Sun, 2013-01-27 at 15:12 -0800, Hugh Dickins wrote:
On Sat, 26 Jan 2013, Simon Jeons wrote:
Could you explain why need check page-mapping twice after get page?
Once for the !locked case, which should not return page if mapping changed
On Sun, 27 Jan 2013, Simon Jeons wrote:
On Sun, 2013-01-27 at 15:05 -0800, Hugh Dickins wrote:
On Sat, 26 Jan 2013, Simon Jeons wrote:
How can this happen? We only permit switching merge_across_nodes when
pages_shared is 0, and usually set run 2 to force that beforehand, which
On Sun, 27 Jan 2013, Simon Jeons wrote:
On Fri, 2013-01-25 at 18:01 -0800, Hugh Dickins wrote:
Switching merge_across_nodes after running KSM is liable to oops on stale
nodes still left over from the previous stable tree. It's not something
Since this patch solve the problem, so
On Mon, 28 Jan 2013, Andrew Morton wrote:
On Fri, 25 Jan 2013 17:53:10 -0800 (PST)
Hugh Dickins hu...@google.com wrote:
Here's a KSM series
Sanity check: do you have a feeling for how useful KSM is?
Performance/space improvements for typical (or atypical) workloads?
Are people using
On Mon, 28 Jan 2013, Andrew Morton wrote:
On Fri, 25 Jan 2013 17:54:53 -0800 (PST)
Hugh Dickins hu...@google.com wrote:
--- mmotm.orig/Documentation/vm/ksm.txt 2013-01-25 14:36:31.724205455
-0800
+++ mmotm/Documentation/vm/ksm.txt 2013-01-25 14:36:38.608205618 -0800
@@ -58,6
On Mon, 28 Jan 2013, Andrew Morton wrote:
On Fri, 25 Jan 2013 17:54:53 -0800 (PST)
Hugh Dickins hu...@google.com wrote:
+/* Zeroed when merging across nodes is not allowed */
+static unsigned int ksm_merge_across_nodes = 1;
I spose this should be __read_mostly. If __read_mostly
On Mon, 28 Jan 2013, Andrew Morton wrote:
On Fri, 25 Jan 2013 17:58:11 -0800 (PST)
Hugh Dickins hu...@google.com wrote:
+#ifdef CONFIG_NUMA
+#define NUMA(x)(x)
+#define DO_NUMA(x) (x)
Did we consider
#define DO_NUMA do { (x) } while (0)
?
It didn't occur to me
On Mon, 28 Jan 2013, Andrew Morton wrote:
On Fri, 25 Jan 2013 18:01:59 -0800 (PST)
Hugh Dickins hu...@google.com wrote:
+static int remove_all_stable_nodes(void)
+{
+ struct stable_node *stable_node;
+ int nid;
+ int err = 0;
+
+ for (nid = 0; nid nr_node_ids; nid
On Thu, 24 Jan 2013, Mel Gorman wrote:
The function names page_xchg_last_nid(), page_last_nid() and
reset_page_last_nid() were judged to be inconsistent so rename them
to a struct_field_op style pattern. As it looked jarring to have
reset_page_mapcount() and page_nid_reset_last() beside each
On Mon, 28 Jan 2013, Kirill A. Shutemov wrote:
From: Kirill A. Shutemov kirill.shute...@linux.intel.com
Here's first steps towards huge pages in page cache.
The intend of the work is get code ready to enable transparent huge page
cache for the most simple fs -- ramfs.
It's not yet near
After sending the first 2MB, scp over wireless becomes unbearably slow,
with frequent stalls: on this ThinkPad T420s running 3.8-rc4 or 3.7.3.
Not always, but often.
Bisection led to commit f590dcec944552f9a4a61155810f3abd17d6465d
iwlwifi: fix the reclaimed packet tracking upon flush queue
On Sun, 20 Jan 2013, Grumbach, Emmanuel wrote:
On Sun, Jan 20, 2013 at 6:56 AM, Hugh Dickins hu...@google.com wrote:
After sending the first 2MB, scp over wireless becomes unbearably
slow, with frequent stalls: on this ThinkPad T420s running 3.8-rc4 or
3.7.3.
Not always
On Wed, 13 Feb 2013, Andrew Morton wrote:
On Wed, 13 Feb 2013 11:39:29 +
Catalin Marinas catalin.mari...@arm.com wrote:
ARM processors with LPAE enabled use 3 levels of page tables, with an
entry in the top level (pgd) covering 1GB of virtual space. Because of
the branch relocation
On Thu, 14 Feb 2013, Mel Gorman wrote:
On Fri, Feb 08, 2013 at 11:33:40AM -0800, Hugh Dickins wrote:
What I found is that a 4th cause emerges once KSM migration
is properly working: that interval during page migration when the old
page has been fully unmapped but the new not yet mapped
On Thu, 14 Feb 2013, Dave Jones wrote:
On Wed, Feb 13, 2013 at 11:56:25AM -0800, Linus Torvalds wrote:
On Wed, Feb 13, 2013 at 11:34 AM, Dave Jones da...@redhat.com wrote:
My test was a loop of 100 suspend/resume cycles before calling something
'good'. The 'bad' cases all failed
On Thu, 14 Feb 2013, Linus Torvalds wrote:
On Thu, Feb 14, 2013 at 6:09 PM, Hugh Dickins hu...@google.com wrote:
Which won't affect my case since I never enabled it.
Well, in theory, you may have the same bug Dave just made it easier to
trigger for himself with the forced config option
On Sat, 16 Feb 2013, Linus Torvalds wrote:
On Sat, Feb 16, 2013 at 1:45 PM, Hugh Dickins hu...@google.com wrote:
I hacked around on your PM_TRACE set_magic_time() / read_magic_time()
yesterday, to save an oopsing core kernel ip there, instead of hashed
pm trace info (it makes sense
On Sat, 16 Feb 2013, Hugh Dickins wrote:
On Sat, 16 Feb 2013, Linus Torvalds wrote:
I think it's worth it to give them a heads-up already. So I've cc'd
the main suspects here..
Okay, thanks.
Daniel, Dave - any comments about a NULL fb in
intel_choose_pipe_bpp_dither() during
On Sun, 17 Feb 2013, Daniel Vetter wrote:
On Sun, Feb 17, 2013 at 3:21 AM, Hugh Dickins hu...@google.com wrote:
On Sat, 16 Feb 2013, Hugh Dickins wrote:
On Sat, 16 Feb 2013, Linus Torvalds wrote:
I think it's worth it to give them a heads-up already. So I've cc'd
the main suspects
On Mon, 18 Feb 2013, Li Haifeng wrote:
For explain my question, the two points should be displayed as below.
1. If an anonymous page is swapped out, this page will be deleted
from swap cache and be put back into buddy system.
Yes, unless the page is referenced again before it comes to be
On Mon, 18 Feb 2013, Catalin Marinas wrote:
From: Hugh Dickins hu...@google.com
You're being generous to me :)
Thanks for doing most of the work, yes, this looks fine.
BUt I'd have expected a Cc stable below: see comment on 2/2.
Hugh
On architectures where a pgd entry may be shared between
Marinas catalin.mari...@arm.com
Cc: Russell King li...@arm.linux.org.uk
Cc: Hugh Dickins hu...@google.com
Cc: Andrew Morton a...@linux-foundation.org
---
arch/arm/include/asm/pgtable.h | 7 +++
1 file changed, 7 insertions(+)
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm
On Tue, 19 Feb 2013, Ric Mason wrote:
There is a call of try_to_free_swap in function swap_writepage, if
swap_writepage is call from shrink_page_list path, PageSwapCache(page) ==
trure, PageWriteback(page) maybe false, page_swapcount(page) == 0, then will
delete the page from swap cache and
On Tue, 19 Feb 2013, Will Huck wrote:
Another question:
I don't see the connection to deleting a swapped out page from swap cache.
Why kernel memory mapping use direct mapping instead of kmalloc/vmalloc which
will setup mapping on demand?
I may misunderstand you, and kernel memory
On Tue, 19 Feb 2013, Sha Zhengju wrote:
On Tue, Feb 19, 2013 at 2:53 PM, Li Haifeng omy...@gmail.com wrote:
2013/2/19 Will Huck will.hu...@gmail.com:
On 02/19/2013 10:04 AM, Li Haifeng wrote:
If a anonymous page is swapped out and comes to be reclaimable,
shrink_page_list() will call
the
corruption which 2.6.35 then immediately bestowed upon mpol=local.
Signed-off-by: Greg Thelen gthe...@google.com
Acked-by: Hugh Dickins hu...@google.com
I'm inclined to add
Cc: sta...@vger.kernel.org
to this one, but not to the 2/2 leak one; but I'm perfectly
happy if Andrew chooses differently
, and nicely fixed - but one doubt below. If you resolve
that, please add my Acked-by: Hugh Dickins hu...@google.com
Signed-off-by: Greg Thelen gthe...@google.com
---
mm/shmem.c | 12 +---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/mm/shmem.c b/mm/shmem.c
index
Here's a second KSM series, based on mmotm 2013-02-19-17-20: partly in
response to Mel's review feedback, partly fixes to issues that I found
myself in doing more review and testing. None of the issues fixed are
truly show-stoppers, though I would prefer them fixed sooner than later.
1 ksm: add
501 - 600 of 4042 matches
Mail list logo
