Re: memory reclaim problems on fs usage

["Arkadiusz Miśkiewicz" <arekm@maven.pl>]

On Wednesday 11 of November 2015, Tetsuo Handa wrote:
> On 2015/11/11 7:13, Arkadiusz Miśkiewicz wrote:
> > The usual (repeatable) problem is like this:
> > 
> > full dmesg: http://sprunge.us/VEiE (more in it then in partial log below)
> 
> Maybe somebody doing GFP_NOIO allocation which XFS driver doing GFP_NOFS
> allocation is waiting for is stalling inside memory allocator. I think that
> checking tasks which are stalling inside memory allocator would help.
> 
> Please try reproducing this problem with a debug printk() patch shown below
> applied. This is a patch which I used for debugging silent lockup problem.
> When memory allocation got stuck, lines with MemAlloc keyword will be
> printed.
> 
> ---
>   fs/xfs/kmem.c          |  10 ++-
>   fs/xfs/xfs_buf.c       |   3 +-
>   include/linux/mmzone.h |   1 +
>   include/linux/vmstat.h |   1 +
>   mm/page_alloc.c        | 217
> +++++++++++++++++++++++++++++++++++++++++++++++++ mm/vmscan.c            |
>  22 +++++
>   6 files changed, 249 insertions(+), 5 deletions(-)

This patch is against which tree? (tried 4.1, 4.2 and 4.3)

-- 
Arkadiusz Miśkiewicz, arekm / ( maven.pl | pld-linux.org )

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