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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2007-03-16 22:38:26 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-03-17 03:25:05 +0100 |
| commit | 89a09141df6ac1c3821fbe44ca8384eb37692965 (patch) | |
| tree | ccb21055fca86ac2657b3262ac37eb3e5c44bea0 /fs/nfs/sysctl.c | |
| parent | [PATCH] fix rescan_partitions to return errors properly (diff) | |
| download | linux-89a09141df6ac1c3821fbe44ca8384eb37692965.tar.xz linux-89a09141df6ac1c3821fbe44ca8384eb37692965.zip | |
[PATCH] nfs: fix congestion control
The current NFS client congestion logic is severly broken, it marks the
backing device congested during each nfs_writepages() call but doesn't
mirror this in nfs_writepage() which makes for deadlocks. Also it
implements its own waitqueue.
Replace this by a more regular congestion implementation that puts a cap on
the number of active writeback pages and uses the bdi congestion waitqueue.
Also always use an interruptible wait since it makes sense to be able to
SIGKILL the process even for mounts without 'intr'.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nfs/sysctl.c')
| -rw-r--r-- | fs/nfs/sysctl.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/nfs/sysctl.c b/fs/nfs/sysctl.c index fcdcafbb3293..b62481dabae9 100644 --- a/fs/nfs/sysctl.c +++ b/fs/nfs/sysctl.c @@ -50,6 +50,14 @@ static ctl_table nfs_cb_sysctls[] = { .proc_handler = &proc_dointvec_jiffies, .strategy = &sysctl_jiffies, }, + { + .ctl_name = CTL_UNNUMBERED, + .procname = "nfs_congestion_kb", + .data = &nfs_congestion_kb, + .maxlen = sizeof(nfs_congestion_kb), + .mode = 0644, + .proc_handler = &proc_dointvec, + }, { .ctl_name = 0 } }; |