Messages in this thread | | | Subject | Re: [GIT PULL] Btrfs changes for 2.6.30-rc | From | Chris Mason <> | Date | Tue, 21 Apr 2009 13:02:47 -0400 |
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On Tue, 2009-04-21 at 09:29 -0400, Chris Mason wrote: > Hello everyone, > > The master branch of: > > git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable.git > > Has some fixes for oopsen and a cluster of bugs inside of one of the > btree readahead functions. > > I also jumped on the fsync latency train for btrfs and switched over to > WRITE_SYNC for the writes I was going to wait on. > > This is a bigger change in btrfs because I had to add a high priority > list to the async helper threads, but it had a big impact on performance > overall. Before, the writes we were waiting on would get stuck behind > the less critical writes in the async helper threads, and now they pop > out much faster. > > Average fsync latencies concurrent with a streaming writer went down > from ~5 seconds (with longer peaks) to < 1 second. >
Jens Axboe hit a bug in fallocate, I've pushed that fix out today as well. Updated shortlog/diffstat:
Chris Mason (5): Btrfs: use WRITE_SYNC for synchronous writes Btrfs: add a priority queue to the async thread helpers Btrfs: fix oops on page->mapping->host during writepage Btrfs: use the right node in reada_for_balance Btrfs: fix btrfs fallocate oops and deadlock
fs/btrfs/async-thread.c | 60 ++++++++++++++++++----- fs/btrfs/async-thread.h | 2 fs/btrfs/ctree.c | 17 ++++-- fs/btrfs/disk-io.c | 9 ++- fs/btrfs/extent_io.c | 86 ++++++++++++++++++++++++--------- fs/btrfs/file.c | 6 +- fs/btrfs/inode.c | 36 ++++++++++--- fs/btrfs/ordered-data.c | 2 fs/btrfs/volumes.c | 124 +++++++++++++++++++++++++++++++++++++----------- fs/btrfs/volumes.h | 13 ++++-
-chris
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