On Thu, 22 Aug 2013, Sha Zhengju wrote:
> On Wed, Aug 21, 2013 at 11:35 PM, Sage Weil <sage@xxxxxxxxxxx> wrote:
> > On Wed, 21 Aug 2013, Sha Zhengju wrote:
> >> Following we will begin to add memcg dirty page accounting around
> >> __set_page_dirty_{buffers,nobuffers} in vfs layer, so we'd better use vfs interface to
> >> avoid exporting those details to filesystems.
> >>
> >> Since vfs set_page_dirty() should be called under page lock, here we don't need elaborate
> >> codes to handle racy anymore, and two WARN_ON() are added to detect such exceptions.
> >> Thanks very much for Sage and Yan Zheng's coaching!
> >>
> >> I tested it in a two server's ceph environment that one is client and the other is
> >> mds/osd/mon, and run the following fsx test from xfstests:
> >>
> >> ./fsx 1MB -N 50000 -p 10000 -l 1048576
> >> ./fsx 10MB -N 50000 -p 10000 -l 10485760
> >> ./fsx 100MB -N 50000 -p 10000 -l 104857600
> >>
> >> The fsx does lots of mmap-read/mmap-write/truncate operations and the tests completed
> >> successfully without triggering any of WARN_ON.
> >>
> >> Signed-off-by: Sha Zhengju <handai.szj@xxxxxxxxxx>
> >
> > Reviewed-by: Sage Weil <sage@xxxxxxxxxxx>
> >
> > Would you like me to take this through the ceph tree?
> >
>
> Yes, of course. : )
> BTW I lost my from: From: Sha Zhengju <handai.szj@xxxxxxxxxx>
Fixed the authorship and pushed to the testing branch. Assuming it's
stable under testing this will go upstream in the next window.
Thanks!
sage
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