On Mon, 2007-04-16 at 16:24 +0800, Zhou Yingchao wrote:
When we run a two nfs client and a nfs server in the following way, we
met a livelock / starvation condition.
MachineAMachineB
Client1 Client2
Server
As shown in the figure, we run a client and server on one
The latest version of the per device dirty throttling.
Dropped all the congestion_wait() churn, will contemplate a rename patch.
Reworked the BDI statistics to use percpu_counter.
against 2.6.21-rc6-mm1; the first patch is for easy application.
Andrew can of course just drop the patch it
Count per BDI dirty pages.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
fs/buffer.c |1 +
include/linux/backing-dev.h |1 +
mm/page-writeback.c |2 ++
mm/truncate.c |1 +
4 files changed, 5 insertions(+)
Index: linux-2.6-mm/fs
. A DBI that has a large dirty limit but does
not have any dirty pages outstanding is a waste.
What is done is to keep a floating proportion between the DBIs based on
writeback completions. This way faster/more active devices get a larger share
than slower/idle devices.
Signed-off-by: Peter Zijlstra
Provide scalable per backing_dev_info statistics counters.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
include/linux/backing-dev.h | 50 ++--
mm/backing-dev.c| 26 ++
2 files changed, 74 insertions(+), 2
Expose the per BDI stats in /sys/block/dev/queue/*
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
block/ll_rw_blk.c | 32
1 file changed, 32 insertions(+)
Index: linux-2.6-mm/block/ll_rw_blk.c
With the current logic the percpu_counter's accuracy delta is quadric
wrt the number of cpus in the system, reduce this to O(n ln n).
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
include/linux/percpu_counter.h |7 ++-
1 file changed, 2 insertions(+), 5 deletions(-)
Index: linux
provide BDI constructor/destructor hooks
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
block/ll_rw_blk.c |2 ++
drivers/block/rd.c |6 ++
drivers/char/mem.c |2 ++
drivers/mtd/mtdcore.c |5 +
fs/char_dev.c
Expose the per BDI stats in /sys/block/dev/queue/*
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
block/ll_rw_blk.c | 49 +
mm/page-writeback.c |2 +-
2 files changed, 50 insertions(+), 1 deletion(-)
Index: linux-2.6/block/ll_rw_blk.c
For ease of application..
---
block/ll_rw_blk.c | 29 -
fs/buffer.c |1 -
include/linux/backing-dev.h |2 --
mm/page-writeback.c | 13 ++---
mm/truncate.c |1 -
5 files changed, 2 insertions(+),
Its redundant, clear_bdi_congested() already wakes the waiters.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
fs/nfs/write.c |4 +---
include/linux/backing-dev.h |1 -
mm/backing-dev.c| 13 -
3 files changed, 1 insertion(+), 17 deletions
Count per BDI writeback pages.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
include/linux/backing-dev.h |1 +
mm/page-writeback.c | 12 ++--
2 files changed, 11 insertions(+), 2 deletions(-)
Index: linux-2.6/mm/page-writeback.c
Add percpu_counter_mod64() to allow large modifications.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
include/linux/percpu_counter.h |9 +
lib/percpu_counter.c | 28
2 files changed, 37 insertions(+)
Index: linux-2.6/include/linux
On Tue, 2007-04-17 at 21:19 -0400, Trond Myklebust wrote:
I've split the issues introduced by the 2.6.21-rcX write code up into 4
subproblems.
The first patch is just a cleanup in order to ease review.
Patch number 2 ensures that we never release the PG_writeback flag until
_after_ we've
On Wed, 2007-04-18 at 10:19 +0200, Peter Zijlstra wrote:
On Tue, 2007-04-17 at 21:19 -0400, Trond Myklebust wrote:
I've split the issues introduced by the 2.6.21-rcX write code up into 4
subproblems.
The first patch is just a cleanup in order to ease review.
Patch number 2 ensures
if they are not.
Ah, yes, good catch. How about this:
---
Since we're adding 3 stat counters, tripple the per counter delta as
well.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
mm/page-writeback.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux-2.6/mm/page-writeback.c
On Thu, 2007-04-19 at 19:44 +0200, Miklos Szeredi wrote:
Count per BDI unstable pages.
I'm wondering, is it really worth having this category separate from
per BDI brity pages?
With the exception of the export to sysfs, always the sum of unstable
+ dirty is used.
I guess you are
On Thu, 2007-04-19 at 20:12 +0200, Peter Zijlstra wrote:
On Thu, 2007-04-19 at 19:44 +0200, Miklos Szeredi wrote:
Count per BDI unstable pages.
I'm wondering, is it really worth having this category separate from
per BDI brity pages?
With the exception of the export to sysfs
On Thu, 2007-04-19 at 20:46 +0200, Peter Zijlstra wrote:
On Thu, 2007-04-19 at 20:12 +0200, Peter Zijlstra wrote:
On Thu, 2007-04-19 at 19:44 +0200, Miklos Szeredi wrote:
Count per BDI unstable pages.
I'm wondering, is it really worth having this category separate from
per
On Thu, 2007-04-19 at 21:20 +0200, Miklos Szeredi wrote:
Index: linux-2.6/fs/buffer.c
===
--- linux-2.6.orig/fs/buffer.c 2007-04-19 19:59:26.0 +0200
+++ linux-2.6/fs/buffer.c 2007-04-19 20:35:39.0 +0200
Expose the per BDI stats in /sys/block/dev/queue/*
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
block/ll_rw_blk.c | 32
1 file changed, 32 insertions(+)
Index: linux-2.6-mm/block/ll_rw_blk.c
The latest version of the per device dirty throttling.
against 2.6.21-rc6-mm1; the first patch is for easy application.
Andrew can of course just drop the patch it reverts.
Merged BDI_DIRTY and BDI_UNSTABLE into BDI_RECLAIMABLE, and multiplied
bdi_stat_delta() by the number of counters summed.
For ease of application..
---
block/ll_rw_blk.c | 29 -
fs/buffer.c |1 -
include/linux/backing-dev.h |2 --
mm/page-writeback.c | 13 ++---
mm/truncate.c |1 -
5 files changed, 2 insertions(+),
Add percpu_counter_mod64() to allow large modifications.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
include/linux/percpu_counter.h |9 +
lib/percpu_counter.c | 28
2 files changed, 37 insertions(+)
Index: linux-2.6/include/linux
Count per BDI reclaimable pages; nr_reclaimable = nr_dirty + nr_unstable.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
fs/buffer.c |2 ++
fs/nfs/write.c |7 +++
include/linux/backing-dev.h |1 +
mm/page-writeback.c |4
mm
. A DBI that has a large dirty limit but does
not have any dirty pages outstanding is a waste.
What is done is to keep a floating proportion between the DBIs based on
writeback completions. This way faster/more active devices get a larger share
than slower/idle devices.
Signed-off-by: Peter Zijlstra
Count per BDI writeback pages.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
include/linux/backing-dev.h |1 +
mm/page-writeback.c | 12 ++--
2 files changed, 11 insertions(+), 2 deletions(-)
Index: linux-2.6/mm/page-writeback.c
Its redundant, clear_bdi_congested() already wakes the waiters.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
fs/nfs/write.c |4 +---
include/linux/backing-dev.h |1 -
mm/backing-dev.c| 13 -
3 files changed, 1 insertion(+), 17 deletions
With the current logic the percpu_counter's accuracy delta is quadric
wrt the number of cpus in the system, reduce this to O(n ln n).
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
include/linux/percpu_counter.h |7 ++-
1 file changed, 2 insertions(+), 5 deletions(-)
Index: linux
Provide scalable per backing_dev_info statistics counters.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
include/linux/backing-dev.h | 50 ++--
mm/backing-dev.c| 26 ++
2 files changed, 74 insertions(+), 2
provide BDI constructor/destructor hooks
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
block/ll_rw_blk.c |2 ++
drivers/block/rd.c |6 ++
drivers/char/mem.c |2 ++
drivers/mtd/mtdcore.c |5 +
fs/char_dev.c
On Sat, 2007-04-21 at 02:55 -0700, Andrew Morton wrote:
On Fri, 20 Apr 2007 17:51:57 +0200 Peter Zijlstra [EMAIL PROTECTED] wrote:
With the current logic the percpu_counter's accuracy delta is quadric
wrt the number of cpus in the system, reduce this to O(n ln n).
Signed-off-by: Peter
On Sat, 2007-04-21 at 02:55 -0700, Andrew Morton wrote:
On Fri, 20 Apr 2007 17:51:58 +0200 Peter Zijlstra [EMAIL PROTECTED] wrote:
Add percpu_counter_mod64() to allow large modifications.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
include/linux/percpu_counter.h |9
On Sat, 2007-04-21 at 02:55 -0700, Andrew Morton wrote:
On Fri, 20 Apr 2007 17:52:01 +0200 Peter Zijlstra [EMAIL PROTECTED] wrote:
Count per BDI reclaimable pages; nr_reclaimable = nr_dirty + nr_unstable.
hm. Aggregating dirty and unstable at inc/dec time is a bit kludgy. If
later on we
On Sat, 2007-04-21 at 02:55 -0700, Andrew Morton wrote:
On Fri, 20 Apr 2007 17:52:02 +0200 Peter Zijlstra [EMAIL PROTECTED] wrote:
Count per BDI writeback pages.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
include/linux/backing-dev.h |1 +
mm/page-writeback.c
On Sat, 2007-04-21 at 02:55 -0700, Andrew Morton wrote:
On Fri, 20 Apr 2007 17:52:03 +0200 Peter Zijlstra [EMAIL PROTECTED] wrote:
Expose the per BDI stats in /sys/block/dev/queue/*
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
block/ll_rw_blk.c | 32
On Sat, 2007-04-21 at 02:55 -0700, Andrew Morton wrote:
On Fri, 20 Apr 2007 17:52:04 +0200 Peter Zijlstra [EMAIL PROTECTED] wrote:
Scale writeback cache per backing device, proportional to its writeout
speed.
By decoupling the BDI dirty thresholds a number of problems we currently
+/*
+ * maximal error of a stat counter.
+ */
+static inline unsigned long bdi_stat_delta(void)
+{
+#ifdef CONFIG_SMP
+ return NR_CPUS * FBC_BATCH;
This is enormously wrong for CONFIG_NR_CPUS=1024 on a 2-way.
Right, I knew about that but, uhm.
I wanted to make that
with remaining BKL
users (notably tty).
Compile tested only, since I didn't dare boot it.
NOT-Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
fs/reiserfs/inode.c|4 ++--
fs/reiserfs/journal.c | 12 ++--
fs/reiserfs/super.c|1 +
fs/reiserfs/xattr.c
On Sat, 2007-04-21 at 12:14 -0400, Jeff Mahoney wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Peter Zijlstra wrote:
Replace all the lock_kernel() instances with reiserfs_write_lock(sb),
and make that use an actual per super-block mutex instead of
lock_kernel().
This should
On Sat, 2007-04-21 at 12:21 -0700, Andrew Morton wrote:
On Sat, 21 Apr 2007 13:02:26 +0200 Peter Zijlstra [EMAIL PROTECTED] wrote:
+ cpu = get_cpu();
+ pcount = per_cpu_ptr(fbc-counters, cpu);
+ count = *pcount + amount;
+ if (count = FBC_BATCH || count
On Sat, 2007-04-21 at 14:15 +0200, Peter Zijlstra wrote:
+/*
+ * maximal error of a stat counter.
+ */
+static inline unsigned long bdi_stat_delta(void)
+{
+#ifdef CONFIG_SMP
+ return NR_CPUS * FBC_BATCH;
This is enormously wrong for CONFIG_NR_CPUS=1024
On Wed, 2007-04-18 at 17:27 -0400, Chuck Ebbert wrote:
Bartlomiej Zolnierkiewicz wrote:
On Wednesday 18 April 2007, Chuck Ebbert wrote:
Mark Lord wrote:
Mark Lord wrote:
With the patch applied, I don't see *any* new activity in those
S.M.A.R.T.
attributes over multiple hibernates
On Sun, 2007-04-22 at 00:19 -0700, Andrew Morton wrote:
It could be that we never call test_clear_page_writeback() against
!bdi_cap_writeback_dirty() pages anwyay. I can't think why we would, but
the relationships there aren't very clear. Does don't account for dirty
memory imply doesn't
On Sat, 2007-04-21 at 22:25 +0200, Miklos Szeredi wrote:
The other deadlock, in throttle_vm_writeout() is still to be solved.
Let's go back to the original changelog:
Author: marcelo.tosatti marcelo.tosatti
Date: Tue Mar 8 17:25:19 2005 +
[PATCH] vm: pageout
On Mon, 2007-04-23 at 08:48 -0700, Christoph Lameter wrote:
On Sat, 21 Apr 2007, Peter Zijlstra wrote:
This is enormously wrong for CONFIG_NR_CPUS=1024 on a 2-way.
Right, I knew about that but, uhm.
I wanted to make that num_online_cpus(), and install a hotplug notifier
to fold
On Tue, 2007-04-24 at 12:58 +1000, Neil Brown wrote:
On Friday April 20, [EMAIL PROTECTED] wrote:
Scale writeback cache per backing device, proportional to its writeout
speed.
So it works like this:
We account for writeout in full pages.
When a page has the Writeback flag cleared,
On Tue, 2007-04-24 at 10:19 +0200, Miklos Szeredi wrote:
This is probably a
reasonable thing to do but it doesn't feel like the right place. I
think get_dirty_limits should return the raw threshold, and
balance_dirty_pages should do both tests - the bdi-local test and the
On Tue, 2007-04-24 at 11:14 +0200, Miklos Szeredi wrote:
I'm still not quite sure what purpose the above soft limiting
serves. It seems to just give advantage to writers, which managed to
accumulate lots of dirty pages, and then can convert that into even
more dirtyings.
The
On Tue, 2007-04-24 at 03:00 -0700, Andrew Morton wrote:
On Tue, 24 Apr 2007 11:47:20 +0200 Miklos Szeredi [EMAIL PROTECTED] wrote:
Ahh, now I see; I had totally blocked out these few lines:
pages_written += write_chunk - wbc.nr_to_write;
if
On Tue, 2007-04-24 at 12:19 +0200, Miklos Szeredi wrote:
Ahh, now I see; I had totally blocked out these few lines:
pages_written += write_chunk - wbc.nr_to_write;
if (pages_written = write_chunk)
On Fri, 2007-03-09 at 10:15 +0200, Pekka J Enberg wrote:
+static int revoke_vma(struct vm_area_struct *vma, struct zap_details
*details)
+{
+ unsigned long restart_addr, start_addr, end_addr;
+ int need_break;
+
+ start_addr = vma-vm_start;
+ end_addr = vma-vm_end;
+
+
On Sun, 2007-03-11 at 11:17 +0100, Rafael J. Wysocki wrote:
Hi,
The following three patches make swsusp use its own data structures for memory
management instead of special page flags. Thus the page flags used so far by
swsusp (PG_nosave, PG_nosave_free) can be used for other purposes and I
On Sun, 2007-03-11 at 15:50 +0200, Michael S. Tsirkin wrote:
Quoting Roland Dreier [EMAIL PROTECTED]:
Subject: Re: IPoIB caused a kernel: BUG: soft lockup detected on CPU#0!
Feb 27 17:47:52 sw169 kernel: [8053aaf1]
_spin_lock_irqsave+0x15/0x24
Feb 27 17:47:52 sw169 kernel:
On Mon, 2007-03-12 at 08:26 -0700, Linus Torvalds wrote:
So good fairness really should involve some notion of work done for
others. It's just not very easy to do..
A solution that is already in demand is a class based scheduler, where
the thread doing work for a client (temp.) joins the
On Mon, 2007-03-12 at 21:11 +0100, Mike Galbraith wrote:
How would you go about ensuring that there won't be any cycles wasted?
SCHED_IDLE or otherwise nice 19
Killing the known corner case starvation scenarios is wonderful, but
let's not just pretend that interactive tasks don't have any
* (previous cycle speed) + this cycle's events.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
block/ll_rw_blk.c |3 +
include/linux/backing-dev.h |7 +++
include/linux/writeback.h | 10
kernel/sysctl.c | 10 +++-
mm/page-writeback.c | 102
On Thu, 2007-03-15 at 03:14 +0530, Syed Ahemed wrote:
Getting RHEL's source ( http://lkml.org/lkml/2005/3/21/380 ) was an
idea i thought about but then a download of the RHEL source from the
following location was denied .
http://download.fedora.redhat.com/pub/fedora/linux/core/1/SRPMS/ and
On Wed, 2007-03-14 at 15:58 -0400, Ashif Harji wrote:
This patch unconditionally calls mark_page_accessed to prevent pages,
especially for small files, from being evicted from the page cache despite
frequent access.
Since we're hackling over the use-once stuff again...
/me brings up:
On Thu, 2007-03-15 at 20:10 +0100, Eric Dumazet wrote:
Hi
I'm pleased to present these patches which improve linux futex performance
and
scalability, on both UP, SMP and NUMA configs.
I had this idea last year but I was not understood, probably because I gave
not enough explanations.
On Thu, 2007-03-15 at 11:06 -0800, Andrew Morton wrote:
On Tue, 13 Mar 2007 17:50:14 +0100 Folkert van Heusden [EMAIL PROTECTED]
wrote:
...
[ 1756.728209] BUG: workqueue leaked lock or atomic: nfsd4/0x/3577
[ 1756.728271] last function: laundromat_main+0x0/0x69 [nfsd]
[
On Fri, 2007-03-16 at 10:30 +0100, Eric Dumazet wrote:
On Friday 16 March 2007 09:05, Peter Zijlstra wrote:
On Thu, 2007-03-15 at 20:10 +0100, Eric Dumazet wrote:
Hi
I'm pleased to present these patches which improve linux futex
performance and scalability, on both UP, SMP and NUMA
On Tue, 2007-03-13 at 10:52 +0100, [EMAIL PROTECTED] wrote:
plain text document attachment (futex-requeue-pi.diff)
This patch provides the futex_requeue_pi functionality.
This provides an optimization, already used for (normal) futexes, to be used
for
PI-futexes.
This optimization is
On Fri, 2007-03-16 at 11:30 +0100, Eric Dumazet wrote:
On Friday 16 March 2007 11:10, Peter Zijlstra wrote:
http://programming.kicks-ass.net/kernel-patches/futex-vma-cache/vma_cache.p
atch
Oh thanks
But if it has to walk the vmas (and take mmap_sem), you already loose
-by: Peter Zijlstra [EMAIL PROTECTED]
Cc: Trond Myklebust [EMAIL PROTECTED]
---
fs/nfs/write.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux-2.6-git/fs/nfs/write.c
===
--- linux-2.6-git.orig/fs/nfs/write.c 2007-01
+0x252/0x265
[c047f04e] sys_ioctl+0x49/0x63
[c0404070] syscall_call+0x7/0xb
Annotate BLKPG_DEL_PARTITION's bd_mutex locking and add a little comment
clarifying the bd_mutex locking, because I confused myself and initially
thought the lock order was wrong too.
Signed-off-by: Peter Zijlstra [EMAIL
On Sat, 2007-02-17 at 11:42 +0100, Jaya Kumar wrote:
Hi James, Geert, lkml and mm,
Hi Jaya,
This patch adds support for the Hecuba/E-Ink display with deferred IO.
The changes from the previous version are to switch to using a mutex
and lock_page. I welcome your feedback and advice.
This
Count per BDI dirty pages.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
fs/buffer.c |1 +
include/linux/backing-dev.h |1 +
mm/page-writeback.c |2 ++
mm/truncate.c |1 +
4 files changed, 5 insertions(+)
Index: linux-2.6/fs/buffer.c
Count per BDI writeback pages.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
include/linux/backing-dev.h |1 +
mm/page-writeback.c |8 ++--
2 files changed, 7 insertions(+), 2 deletions(-)
Index: linux-2.6/mm/page-writeback.c
Provide scalable per backing_dev_info statistics counters modeled on the ZVC
code.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
block/ll_rw_blk.c |1
drivers/block/rd.c |2
drivers/char/mem.c |2
fs/char_dev.c |1
include/linux
' in writeout events.
Each writeout increases time and adds to a per bdi counter. This counter is
halved when a period expires. So per bdi speed is:
0.5 * (previous cycle speed) + this cycle's events.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
include/linux/backing-dev.h |8 ++
mm
Count per BDI unstable pages.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
fs/nfs/write.c |4
include/linux/backing-dev.h |1 +
2 files changed, 5 insertions(+)
Index: linux-2.6/fs/nfs/write.c
This patch-set implements per device dirty page throttling. Which should solve
the problem we currently have with one device hogging the dirty limit.
Preliminary testing shows good results:
mem=128M
time (dd if=/dev/zero of=/mnt/dev/zero bs=4096 count=$((1024*1024/4)); sync)
1GB to disk
real
Expose the per BDI stats in /sys/block/dev/queue/*
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
block/ll_rw_blk.c | 51 +++
1 file changed, 51 insertions(+)
Index: linux-2.6/block/ll_rw_blk.c
Sorry for duplicates, I was fooled by an MTA hanging on to them for a
few hours. I counted them lost in cyberspace.
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at
unbounded.
It goes *BANG* when using NFS,... need to look into that.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
include/linux/backing-dev.h | 12
mm/page-writeback.c | 37 ++---
2 files changed, 34 insertions(+), 15 deletions(-)
Index
On Tue, 2007-03-20 at 18:47 +1100, David Chinner wrote:
On Mon, Mar 19, 2007 at 04:57:37PM +0100, Peter Zijlstra wrote:
This patch-set implements per device dirty page throttling. Which should
solve
the problem we currently have with one device hogging the dirty limit.
Preliminary
On Tue, 2007-03-20 at 20:38 +1100, David Chinner wrote:
On Tue, Mar 20, 2007 at 09:08:24AM +0100, Peter Zijlstra wrote:
On Tue, 2007-03-20 at 18:47 +1100, David Chinner wrote:
So overall we've lost about 15-20% of the theoretical aggregate
perfomrance, but we haven't starved any
without triggering NMI/softlockup msgs.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
fs/fuse/inode.c |1 +
fs/nfs/client.c |1 +
mm/page-writeback.c | 25 +++--
3 files changed, 21 insertions(+), 6 deletions(-)
Index: linux-2.6/fs/nfs/client.c
On Tue, 2007-03-20 at 16:32 +0100, Pierre Peiffer wrote:
Peter Zijlstra a écrit :
+static void *get_futex_address(union futex_key *key)
+{
+ void *uaddr;
+
+ if (key-both.offset 1) {
+ /* shared mapping */
+ uaddr = (void*)((key-shared.pgoff PAGE_SHIFT
On Wed, 2007-03-21 at 15:57 +0100, Mike Galbraith wrote:
'f' is a progglet which sleeps a bit and burns a bit, duration depending
on argument given. 'sh' is a shell 100% hog. In this scenario, the
argument was set such that 'f' used right at 50% cpu. All are started
at the same time, and I
state was there.
Reported-by: Folkert van Heusden [EMAIL PROTECTED]
Inspired-by: Oleg Nesterov [EMAIL PROTECTED]
Signed-off-by: Jarek Poplawski [EMAIL PROTECTED]
This looks sane, thanks for figuring this out.
Acked-by: Peter Zijlstra [EMAIL PROTECTED]
---
diff -Nurp 2.6.21-rc4-git4
direct use of this
fields isn't recommended either.)
Reported-by: Folkert van Heusden [EMAIL PROTECTED]
Inspired-by: Oleg Nesterov [EMAIL PROTECTED]
Signed-off-by: Jarek Poplawski [EMAIL PROTECTED]
Acked-by: Peter Zijlstra [EMAIL PROTECTED]
---
diff -Nurp 2.6.21-rc4-git4-/kernel
On Sat, 2007-03-24 at 22:55 +0100, Miklos Szeredi wrote:
This is a slightly different take on the fix for the deadlock in fuse
with dirty balancing. David Chinner convinced me, that per-bdi
counters are too expensive, and that it's not worth trying to account
the number of pages under
On Sun, 2007-03-25 at 13:34 +0200, Miklos Szeredi wrote:
Please have a look at this:
http://lkml.org/lkml/2007/3/19/220
+ if (bdi_nr_reclaimable + bdi_stat(bdi, BDI_WRITEBACK) =
+ bdi_thresh)
+ break;
code cost.
All known users of nonlinear mappings actually use tmpfs, so this
shouldn't have any negative effect.
Signed-off-by: Miklos Szeredi [EMAIL PROTECTED]
Acked-by: Peter Zijlstra [EMAIL PROTECTED]
---
Index: linux-2.6.21-rc4-mm1/mm/fremap.c
the actual mapping
Signed-off-by: Miklos Szeredi [EMAIL PROTECTED]
Acked-by: Peter Zijlstra [EMAIL PROTECTED]
---
Index: linux/mm/mmap.c
===
--- linux.orig/mm/mmap.c 2007-03-24 21:00:40.0 +0100
+++ linux/mm
On Sat, 2007-03-24 at 23:11 +0100, Miklos Szeredi wrote:
From: Miklos Szeredi [EMAIL PROTECTED]
Changes:
v3:
o rename is_page_modified to test_clear_page_modified
v2:
o set AS_CMTIME flag in clear_page_dirty_for_io() too
o don't clear AS_CMTIME in file_update_time()
o check the dirty
On Sun, 2007-03-25 at 16:00 -0800, Andrew Morton wrote:
On Sat, 24 Mar 2007 23:09:19 +0100 Miklos Szeredi [EMAIL PROTECTED] wrote:
Dirty page accounting/limiting doesn't work for nonlinear mappings,
Doesn't it? iirc the problem is that we don't correctly re-clean the ptes
while starting
On Mon, 2007-03-26 at 02:08 -0800, Andrew Morton wrote:
On Mon, 26 Mar 2007 11:32:47 +0200 Miklos Szeredi [EMAIL PROTECTED] wrote:
Stopping writers which have idle queues is completely unproductive,
and that is basically what the current algorithm does.
This is because the kernel permits
On Thu, 2007-04-05 at 15:57 -0700, Andrew Morton wrote:
On Thu, 05 Apr 2007 19:42:19 +0200
[EMAIL PROTECTED] wrote:
Introduce a mechanism to wait on free memory.
Currently congestion_wait() is abused to do this.
Such a very small explanation for such a terrifying change.
Yes, I suck
On Thu, 2007-04-05 at 16:17 -0700, Andrew Morton wrote:
On Thu, 05 Apr 2007 19:42:20 +0200
[EMAIL PROTECTED] wrote:
Only do the congestion wait when we actually encountered congestion.
The name congestion_wait() was accurate back in 2002, but it isn't accurate
any more, and you got
On Thu, 2007-04-05 at 16:24 -0700, Andrew Morton wrote:
On Thu, 05 Apr 2007 19:42:21 +0200
[EMAIL PROTECTED] wrote:
Now that we have per BDI dirty throttling is makes sense to also have oer
BDI
congestion feedback; why wait on another device if the current one is not
congested.
On Thu, 2007-04-05 at 15:37 -0700, Andrew Morton wrote:
On Thu, 05 Apr 2007 19:42:11 +0200
[EMAIL PROTECTED] wrote:
Provide scalable per backing_dev_info statistics counters modeled on the ZVC
code.
Signed-off-by: Peter Zijlstra [EMAIL PROTECTED]
---
block/ll_rw_blk.c
Hi,
some thoughts on shared futexes;
Could we get rid of the mmap_sem on the shared futexes in the following
manner:
- do a page table walk to find the pte;
- get a page using pfn_to_page (skipping VM_PFNMAP)
- get the futex key from page-mapping-host and page-index
and offset from addr
kernel with it :)
Andrew, could we get this in mm as well ? This version is against
2.6.21-rc5-mm4
(so supports 64bit futexes)
In this third version I dropped the NUMA optims and process private hash
table,
to let new API come in and be tested.
Good work, Thanks!
Acked-by: Peter Zijlstra
On Fri, 2007-04-06 at 14:02 +0100, Hugh Dickins wrote:
On Fri, 6 Apr 2007, Peter Zijlstra wrote:
some thoughts on shared futexes;
Could we get rid of the mmap_sem on the shared futexes in the following
manner:
- do a page table walk to find the pte;
(walk meaning descent down
On Fri, 2007-04-06 at 23:15 +1000, Nick Piggin wrote:
Hugh Dickins wrote:
On Fri, 6 Apr 2007, Peter Zijlstra wrote:
some thoughts on shared futexes;
Could we get rid of the mmap_sem on the shared futexes in the following
manner:
I'd imagine shared futexes would be much less common
*ugh* /me no like.
The basic premises seems to be that we can track page owners perfectly
(although this patch set does not yet do so), through get/release
operations (on _mapcount).
This is simply not true for unmapped pagecache pages. Those receive no
'release' event; (the usage by
On Wed, 2007-04-11 at 02:53 -0700, Paul Jackson wrote:
I'm confused - which end of ths stack is up?
cpuset_exit doesn't call do_exit, rather it's the other
way around. But put_files_struct doesn't call do_exit,
rather do_exit calls __exit_files calls put_files_struct.
I'm guessing its
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