Hi, Here is a new patch which increases the performances with reiserfs using a mutex instead of the bkl. Now I've compared with dbench on a fresh and empty reiserfs partition with 64 GB and the results are better with the mutex than with the bkl. Also this new patch increases the throughput a bit more. Dbench on SMP (2 Cpus), Preempt and 100 threads during 400 seconds: Bkl: 37.6764 MB/sec Mutex, before this patch: 39.4532 MB/sec Mutex, after this patch: 40.3758 MB/sec The following graph shows better the difference: http://kernel.org/pub/linux/kernel/people/frederic/dbench.pdf So it looks like on some cases, it is faster (fresh filesystem ?) and sometimes slower (filesystem already well filled ?). Of course it is also supposed to be faster on parallel multiple partitions accesses but I have no benchmark yet to show that. The following changes since commit 2989c5541d5ab1138e538f8c713f491f7b2416b1: Frederic Weisbecker (1): kill-the-bkl/reiserfs: use mutex_lock in reiserfs_mutex_lock_safe are available in the git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git kill-the-bkl/reiserfs Frederic Weisbecker (1): kill-the-bkl/reiserfs: unlock only when needed in search_by_key fs/reiserfs/stree.c | 42 ++++++++++++++++++++++++++++++++++-------- 1 files changed, 34 insertions(+), 8 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe reiserfs-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
