Re: bcache: Fix a writeback performance regression

[Stefan Priebe]

Vanilla 3.10.7 + bcache: Fix a writeback performance regression

http://pastebin.com/raw.php?i=LXZk4cMH

Stefan

Am 16.08.2013 12:11, schrieb Stefan Priebe - Profihost AG:
> Hi,
>
> bcache: Fix a writeback performance regression
>
> this one results in 3.10 into hung tasks in bcache_writeback read_dirty.
>
> Stefan
> Am 15.08.2013 08:43, schrieb Stefan Priebe - Profihost AG:
> > Am 15.08.2013 00:59, schrieb Kent Overstreet:
> > > Jens, here's the latest bcache fixes. Some urgent stuff in here:
> > >
> > >
> > > The following changes since commit 79826c35eb99cd3c0873b8396f45fa26c87fb0b0:
> > >
> > >    bcache: Allocation kthread fixes (2013-07-12 00:22:49 -0700)
> > >
> > > are available in the git repository at:
> > >
> > >    git://evilpiepirate.org/~kent/linux-bcache.git bcache-for-3.11
> > >
> > > for you to fetch changes up to 0434a516e99ee51ac2d0dfa71b2f56c89ac5db05:
> > >
> > >    bcache: Fix a flush/fua performance bug (2013-08-14 15:44:51 -0700)
> > >
> > > ----------------------------------------------------------------
> > > Gabriel de Perthuis (1):
> > >        bcache: Strip endline when writing the label through sysfs
> > >
> > > Geert Uytterhoeven (1):
> > >        bcache: Correct printf()-style format length modifier
> > >
> > > Kent Overstreet (4):
> > >        bcache: Fix a dumb journal discard bug
> > >        bcache: Fix for when no journal entries are found
> > >        bcache: Fix a writeback performance regression
> > >        bcache: Fix a flush/fua performance bug
> > >
> > >   drivers/md/bcache/bcache.h    |  7 +++----
> > >   drivers/md/bcache/btree.c     |  2 +-
> > >   drivers/md/bcache/journal.c   | 33 ++++++++++++++++++++-------------
> > >   drivers/md/bcache/sysfs.c     |  9 +++++++--
> > >   drivers/md/bcache/util.c      | 11 ++++++++++-
> > >   drivers/md/bcache/util.h      | 12 +++++++++---
> > >   drivers/md/bcache/writeback.c | 37 ++++++++++++++++++-------------------
> > >   7 files changed, 68 insertions(+), 43 deletions(-)
> > > --
> >
> > As 3.10 is long term stable release. You might need CC the stable list
> > for patches which have to go to 3.10 as well.
> >
> > At least this one should go to 3.10:
> > > Gabriel de Perthuis (1):
> > >        bcache: Strip endline when writing the label through sysfs
> >
> > Thanks!
> >
> > Greets,
> > Stefan
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