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Subject[PATCH 0/7] kill-the-bkl/reiserfs performances updates
Hi Al, everyone,

This patchset is the result of some lock tracing and analysis.

After doing a dbench test on SMP (2 CPUS) with 100 procs during
about 300 secs, I get the following throughput:

With the bkl:
40 MB/s
With the write lock before this patchset:
31 MB/s
With the write lock after this patchset:
36 MB/s

There is still some work to do but it's a good progress.
It seems to depend on the remaining disk space, sometimes I reach
almost the same performances, sometimes it's lower.

For those who want to test it against -rc4, you can pull on the tree
described below, it's a migration of the reiserfs work that was done
in Ingo's tip:core/kill-the-bkl + this patchset.


The following changes since commit e26767ea29f0eb3271e03ba5355c645e2b39939f:
Frederic Weisbecker (1):
kill-the-BKL/reiserfs: release the write lock on flush_commit_list()

are available in the git repository at:


Frederic Weisbecker (7):
kill-the-BKL/reiserfs: add reiserfs_cond_resched()
kill-the-bkl/reiserfs: conditionaly release the write lock on fs_changed()
kill-the-bkl/reiserfs: lock only once on reiserfs_get_block()
kill-the-bkl/reiserfs: don't hold the write recursively in reiserfs_lookup()
kill-the-bkl/reiserfs: reduce number of contentions in search_by_key()
kill-the-bkl/reiserfs: factorize the locking in reiserfs_write_end()
kill-the-bkl/reiserfs: use mutex_lock in reiserfs_mutex_lock_safe

fs/reiserfs/inode.c | 44 +++++++++++++++++++++++++-----------------
fs/reiserfs/journal.c | 8 ++----
fs/reiserfs/namei.c | 15 ++++++++++---
fs/reiserfs/stree.c | 12 ++++++++++-
include/linux/reiserfs_fs.h | 17 +++++++++++++--
5 files changed, 65 insertions(+), 31 deletions(-)

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