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I've recently been trying to track down the root cause of my server's persistent issue of thrashing horribly after being left inactive. It seems that the issue is likely my nightly backup schedule (using rsync) which traverses my entire 50GB home directory. I was surprised to find that rsync does not use fadvise to notify the kernel of its use-once data usage pattern. It looks like a

From: Raghavendra D Prabhu <rprabhu@wnohang.net> From 51daa88ebd8e0d437289f589af29d4b39379ea76, page_sync_readahead coalesces async readahead into its readahead window, so another checking for that again is not required. Signed-off-by: Raghavendra D Prabhu <rprabhu@wnohang.net> --- fs/btrfs/relocation.c | 10 ++++------ mm/filemap.c | 3 +-- 2 files changed, 5

...espinasse <walken at google.com> >> Cc: Hugh Dickins <hughd at google.com> >> Cc: Rik van Riel <riel at redhat.com> >> Cc: Peter Zijlstra <peterz at infradead.org> >> Cc: Nick Piggin <npiggin at kernel.dk> >> Cc: KOSAKI Motohiro <kosaki.motohiro at jp.fujitsu.com> >> Cc: Ingo Molnar <mingo at elte.hu> >> Cc: "H. Peter Anvin" <hpa at zytor.com> >> Cc: Thomas Gleixner <tglx at linutronix.de> >> Cc: David Howells <dhowells at redhat.com> >>...

...m_is_contended()] Signed-off-by: Michel Lespinasse <walken at google.com> Cc: Hugh Dickins <hughd at google.com> Cc: Rik van Riel <riel at redhat.com> Cc: Peter Zijlstra <peterz at infradead.org> Cc: Nick Piggin <npiggin at kernel.dk> Cc: KOSAKI Motohiro <kosaki.motohiro at jp.fujitsu.com> Cc: Ingo Molnar <mingo at elte.hu> Cc: "H. Peter Anvin" <hpa at zytor.com> Cc: Thomas Gleixner <tglx at linutronix.de> Cc: David Howells <dhowells at redhat.com> Signed-off-by: Andrew Morton <akpm at...

...plementations had working implementations of fadvise. While there was at least one[1] attempt at making kernels' limited fadvise implementations work for rsync, it was quite awkward and it was understandably deemed inappropriate for merge. As a result of discussions with Minchan Kim and KOSAKI Motohiro, Linux has had reasonable support for handling POSIX_FADV_DONTNEED[3]. In particular, issuing this hint will compel the kernel to try reclaiming the affected pages more quickly, which should reduce memory pressure by dirty pages. The accompanying patches adds support for this hint when available....

...small changes to Xen. Tested: sparse/non-sparse/cpumask_offstack/non- cpumask_offstack/nonuma/nosmp on x86_64 Signed-off-by: Mike Travis <travis at sgi.com> Cc: Chris Wright <chrisw at sous-sol.org> Cc: Jeremy Fitzhardinge <jeremy at xensource.com> Cc: KOSAKI Motohiro <kosaki.motohiro at jp.fujitsu.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi at intel.com> Cc: virtualization at lists.osdl.org Cc: xen-devel at lists.xensource.com Cc: Yinghai Lu <yhlu.kernel at gmail.com> :040000 040000 78e163b926ea6c282f3f35397dae4efc084b4b...

...small changes to Xen. Tested: sparse/non-sparse/cpumask_offstack/non- cpumask_offstack/nonuma/nosmp on x86_64 Signed-off-by: Mike Travis <travis at sgi.com> Cc: Chris Wright <chrisw at sous-sol.org> Cc: Jeremy Fitzhardinge <jeremy at xensource.com> Cc: KOSAKI Motohiro <kosaki.motohiro at jp.fujitsu.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi at intel.com> Cc: virtualization at lists.osdl.org Cc: xen-devel at lists.xensource.com Cc: Yinghai Lu <yhlu.kernel at gmail.com> :040000 040000 78e163b926ea6c282f3f35397dae4efc084b4b...

...small changes to Xen. Tested: sparse/non-sparse/cpumask_offstack/non- cpumask_offstack/nonuma/nosmp on x86_64 Signed-off-by: Mike Travis <travis at sgi.com> Cc: Chris Wright <chrisw at sous-sol.org> Cc: Jeremy Fitzhardinge <jeremy at xensource.com> Cc: KOSAKI Motohiro <kosaki.motohiro at jp.fujitsu.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi at intel.com> Cc: virtualization at lists.osdl.org Cc: xen-devel at lists.xensource.com Cc: Yinghai Lu <yhlu.kernel at gmail.com> :040000 040000 78e163b926ea6c282f3f35397dae4efc084b4b...

...nvz.org> Konstantin Khlebnikov <khlebnikov@openvz.org> # add comment Konstantin Khlebnikov<khlebnikov@openvz.org> Konstantin Shlyakhovoy <x0155534@ti.com> Konstantin Stepanyuk <konstantin.stepanyuk@gmail.com> Konstantin Weitz <WEITZKON@de.ibm.com> KOSAKI Motohiro <kosaki.motohiro@gmail.com> KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> KOSAKI Motohiro <mkosaki@jp.fujitsu.com> Kosta Zertsekel <konszert@marvell.com> Kouei Abe <kouei.abe.cp@rms.renesas.com> Kris Karas <bugs-a12@moonlit-rail.com> Krishna Gudipa...

...nvz.org> Konstantin Khlebnikov <khlebnikov@openvz.org> # add comment Konstantin Khlebnikov<khlebnikov@openvz.org> Konstantin Shlyakhovoy <x0155534@ti.com> Konstantin Stepanyuk <konstantin.stepanyuk@gmail.com> Konstantin Weitz <WEITZKON@de.ibm.com> KOSAKI Motohiro <kosaki.motohiro@gmail.com> KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> KOSAKI Motohiro <mkosaki@jp.fujitsu.com> Kosta Zertsekel <konszert@marvell.com> Kouei Abe <kouei.abe.cp@rms.renesas.com> Kris Karas <bugs-a12@moonlit-rail.com> Krishna Gudipa...

...nvz.org> Konstantin Khlebnikov <khlebnikov@openvz.org> # add comment Konstantin Khlebnikov<khlebnikov@openvz.org> Konstantin Shlyakhovoy <x0155534@ti.com> Konstantin Stepanyuk <konstantin.stepanyuk@gmail.com> Konstantin Weitz <WEITZKON@de.ibm.com> KOSAKI Motohiro <kosaki.motohiro@gmail.com> KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> KOSAKI Motohiro <mkosaki@jp.fujitsu.com> Kosta Zertsekel <konszert@marvell.com> Kouei Abe <kouei.abe.cp@rms.renesas.com> Kris Karas <bugs-a12@moonlit-rail.com> Krishna Gudipa...

...nvz.org> Konstantin Khlebnikov <khlebnikov@openvz.org> # add comment Konstantin Khlebnikov<khlebnikov@openvz.org> Konstantin Shlyakhovoy <x0155534@ti.com> Konstantin Stepanyuk <konstantin.stepanyuk@gmail.com> Konstantin Weitz <WEITZKON@de.ibm.com> KOSAKI Motohiro <kosaki.motohiro@gmail.com> KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> KOSAKI Motohiro <mkosaki@jp.fujitsu.com> Kosta Zertsekel <konszert@marvell.com> Kouei Abe <kouei.abe.cp@rms.renesas.com> Kris Karas <bugs-a12@moonlit-rail.com> Krishna Gudipa...

...nvz.org> Konstantin Khlebnikov <khlebnikov@openvz.org> # add comment Konstantin Khlebnikov<khlebnikov@openvz.org> Konstantin Shlyakhovoy <x0155534@ti.com> Konstantin Stepanyuk <konstantin.stepanyuk@gmail.com> Konstantin Weitz <WEITZKON@de.ibm.com> KOSAKI Motohiro <kosaki.motohiro@gmail.com> KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> KOSAKI Motohiro <mkosaki@jp.fujitsu.com> Kosta Zertsekel <konszert@marvell.com> Kouei Abe <kouei.abe.cp@rms.renesas.com> Kris Karas <bugs-a12@moonlit-rail.com> Krishna Gudipa...

...nvz.org> Konstantin Khlebnikov <khlebnikov@openvz.org> # add comment Konstantin Khlebnikov<khlebnikov@openvz.org> Konstantin Shlyakhovoy <x0155534@ti.com> Konstantin Stepanyuk <konstantin.stepanyuk@gmail.com> Konstantin Weitz <WEITZKON@de.ibm.com> KOSAKI Motohiro <kosaki.motohiro@gmail.com> KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> KOSAKI Motohiro <mkosaki@jp.fujitsu.com> Kosta Zertsekel <konszert@marvell.com> Kouei Abe <kouei.abe.cp@rms.renesas.com> Kris Karas <bugs-a12@moonlit-rail.com> Krishna Gudipa...

...nvz.org> Konstantin Khlebnikov <khlebnikov@openvz.org> # add comment Konstantin Khlebnikov<khlebnikov@openvz.org> Konstantin Shlyakhovoy <x0155534@ti.com> Konstantin Stepanyuk <konstantin.stepanyuk@gmail.com> Konstantin Weitz <WEITZKON@de.ibm.com> KOSAKI Motohiro <kosaki.motohiro@gmail.com> KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> KOSAKI Motohiro <mkosaki@jp.fujitsu.com> Kosta Zertsekel <konszert@marvell.com> Kouei Abe <kouei.abe.cp@rms.renesas.com> Kris Karas <bugs-a12@moonlit-rail.com> Krishna Gudipa...

...nvz.org> Konstantin Khlebnikov <khlebnikov@openvz.org> # add comment Konstantin Khlebnikov<khlebnikov@openvz.org> Konstantin Shlyakhovoy <x0155534@ti.com> Konstantin Stepanyuk <konstantin.stepanyuk@gmail.com> Konstantin Weitz <WEITZKON@de.ibm.com> KOSAKI Motohiro <kosaki.motohiro@gmail.com> KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> KOSAKI Motohiro <mkosaki@jp.fujitsu.com> Kosta Zertsekel <konszert@marvell.com> Kouei Abe <kouei.abe.cp@rms.renesas.com> Kris Karas <bugs-a12@moonlit-rail.com> Krishna Gudipa...

...nvz.org> Konstantin Khlebnikov <khlebnikov@openvz.org> # add comment Konstantin Khlebnikov<khlebnikov@openvz.org> Konstantin Shlyakhovoy <x0155534@ti.com> Konstantin Stepanyuk <konstantin.stepanyuk@gmail.com> Konstantin Weitz <WEITZKON@de.ibm.com> KOSAKI Motohiro <kosaki.motohiro@gmail.com> KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> KOSAKI Motohiro <mkosaki@jp.fujitsu.com> Kosta Zertsekel <konszert@marvell.com> Kouei Abe <kouei.abe.cp@rms.renesas.com> Kris Karas <bugs-a12@moonlit-rail.com> Krishna Gudipa...