diff options
| author | Bob Beck <beck@cvs.openbsd.org> | 2008-06-10 20:14:38 +0000 |
|---|---|---|
| committer | Bob Beck <beck@cvs.openbsd.org> | 2008-06-10 20:14:38 +0000 |
| commit | b24b61b32a9fedc5de53427f16b7eb72e27e858d (patch) | |
| tree | 7fb0535d861bd759c5fd3ec6d937d5aa85b4aeda /sys/miscfs | |
| parent | cb3bb3cecc1d0474c3e63d1cdf36ba8c39fdf873 (diff) | |
Buffer cache revamp
1) remove multiple size queues, introduced as a stopgap.
2) decouple pages containing data from their mappings
3) only keep buffers mapped when they actually have to be mapped
(right now, this is when buffers are B_BUSY)
4) New functions to make a buffer busy, and release the busy flag
(buf_acquire and buf_release)
5) Move high/low water marks and statistics counters into a structure
6) Add a sysctl to retrieve buffer cache statistics
Tested in several variants and beat upon by bob and art for a year. run
accidentally on henning's nfs server for a few months...
ok deraadt@, krw@, art@ - who promises to be around to deal with any fallout
Diffstat (limited to 'sys/miscfs')
| -rw-r--r-- | sys/miscfs/specfs/spec_vnops.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/miscfs/specfs/spec_vnops.c b/sys/miscfs/specfs/spec_vnops.c index e175105abc1..3af4f6c1a10 100644 --- a/sys/miscfs/specfs/spec_vnops.c +++ b/sys/miscfs/specfs/spec_vnops.c @@ -1,4 +1,4 @@ -/* $OpenBSD: spec_vnops.c,v 1.49 2008/05/08 17:45:45 thib Exp $ */ +/* $OpenBSD: spec_vnops.c,v 1.50 2008/06/10 20:14:36 beck Exp $ */ /* $NetBSD: spec_vnops.c,v 1.29 1996/04/22 01:42:38 christos Exp $ */ /* @@ -447,7 +447,7 @@ loop: if ((bp->b_flags & B_DELWRI) == 0) panic("spec_fsync: not dirty"); bremfree(bp); - bp->b_flags |= B_BUSY; + buf_acquire(bp); splx(s); bawrite(bp); goto loop; |