Re: Dirty pages underflow on 3.14.23

2015-01-08 Thread Vlastimil Babka
On 01/08/2015 02:04 AM, Simon Kirby wrote: > On Wed, Jan 07, 2015 at 10:48:10PM +0100, Vlastimil Babka wrote: > >> On 01/07/2015 10:28 PM, Simon Kirby wrote: >> >> > Hmm...A possibly-related issue...Before trying this, after a fresh boot, >> > /proc/vmstat showed: >> > >> > nr_alloc_batch 4294541

Re: Dirty pages underflow on 3.14.23

2015-01-07 Thread Simon Kirby
On Wed, Jan 07, 2015 at 10:48:10PM +0100, Vlastimil Babka wrote: > On 01/07/2015 10:28 PM, Simon Kirby wrote: > > > Hmm...A possibly-related issue...Before trying this, after a fresh boot, > > /proc/vmstat showed: > > > > nr_alloc_batch 4294541205 > > This can happen, and not be a problem in gen

Re: Dirty pages underflow on 3.14.23

2015-01-07 Thread Vlastimil Babka
On 01/07/2015 10:28 PM, Simon Kirby wrote: > On Wed, Jan 07, 2015 at 10:57:46AM +, Holger Hoffst?tte wrote: > >> On Tue, 06 Jan 2015 12:54:43 -0500, Mikulas Patocka wrote: >> >> > I can't reprodce it. It happened just once. >> > >> > That patch is supposed to fix an occasional underflow by a

Re: Dirty pages underflow on 3.14.23

2015-01-07 Thread Simon Kirby
On Wed, Jan 07, 2015 at 10:57:46AM +, Holger Hoffst?tte wrote: > On Tue, 06 Jan 2015 12:54:43 -0500, Mikulas Patocka wrote: > > > I can't reprodce it. It happened just once. > > > > That patch is supposed to fix an occasional underflow by a single page - > > while my meminfo showed underflow

Re: Dirty pages underflow on 3.14.23

2015-01-07 Thread Holger Hoffstätte
On Tue, 06 Jan 2015 12:54:43 -0500, Mikulas Patocka wrote: > On Tue, 6 Jan 2015, Johannes Weiner wrote: > >> > The bug probably happened during git pull or apt-get update, though >> > one can't be sure that these commands caused it. >> > >> > I see that 3.14.24 containes some fix for underflow (

Re: Dirty pages underflow on 3.14.23

2015-01-07 Thread Simon Kirby
On Mon, Jan 05, 2015 at 06:05:59PM -0500, Mikulas Patocka wrote: > Hi > > I would like to report a memory management bug where the dirty pages count > underflowed. Hello! I've been hitting this problem for a while now. I've seen it on: 3.12.9 3.14.4 3.16 3.16.6 When it occurs, /proc/vmstat s

Re: Dirty pages underflow on 3.14.23

2015-01-06 Thread Mikulas Patocka
On Tue, 6 Jan 2015, Johannes Weiner wrote: > > The bug probably happened during git pull or apt-get update, though one > > can't be sure that these commands caused it. > > > > I see that 3.14.24 containes some fix for underflow (commit > > 6619741f17f541113a02c30f22a9ca22e32c9546, upstream co

Re: Dirty pages underflow on 3.14.23

2015-01-06 Thread Johannes Weiner
On Mon, Jan 05, 2015 at 06:05:59PM -0500, Mikulas Patocka wrote: > Hi > > I would like to report a memory management bug where the dirty pages count > underflowed. > > It happened after some time that the Dirty pages count underflowed, as can > be seen in /proc/meminfo. The underflow condition

Dirty pages underflow on 3.14.23

2015-01-05 Thread Mikulas Patocka
Hi I would like to report a memory management bug where the dirty pages count underflowed. It happened after some time that the Dirty pages count underflowed, as can be seen in /proc/meminfo. The underflow condition was persistent, /proc/meminfo was showing the big value even when the system w