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| author | jeff <jeff@FreeBSD.org> | 2006-03-31 02:56:30 +0000 |
|---|---|---|
| committer | jeff <jeff@FreeBSD.org> | 2006-03-31 02:56:30 +0000 |
| commit | 2086f279cf6f34c84b68782651af859bd337032d (patch) | |
| tree | 01eafea626f999d93e5778d0b6a0680c55fe937b /sys/kern/vfs_subr.c | |
| parent | 01da4eecd31ee97c8f97e06c60388e309dd70e79 (diff) | |
| download | FreeBSD-src-2086f279cf6f34c84b68782651af859bd337032d.zip FreeBSD-src-2086f279cf6f34c84b68782651af859bd337032d.tar.gz | |
- Add the B_NEEDSGIANT flag which is only set if the vnode that owns a buf
requires Giant. It is set in bgetvp and cleared in brelvp.
- Create QUEUE_DIRTY_GIANT for dirty buffers that require giant.
- In the buf daemon, only grab giant when processing QUEUE_DIRTY_GIANT and
only if we think there are buffers in that queue.
Sponsored by: Isilon Systems, Inc.
Diffstat (limited to 'sys/kern/vfs_subr.c')
| -rw-r--r-- | sys/kern/vfs_subr.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c index 4af051d..8dbee34 100644 --- a/sys/kern/vfs_subr.c +++ b/sys/kern/vfs_subr.c @@ -1440,6 +1440,8 @@ bgetvp(struct vnode *vp, struct buf *bp) ASSERT_VI_LOCKED(vp, "bgetvp"); vholdl(vp); + if (VFS_NEEDSGIANT(vp->v_mount)) + bp->b_flags |= B_NEEDSGIANT; bp->b_vp = vp; bp->b_bufobj = &vp->v_bufobj; /* @@ -1477,6 +1479,7 @@ brelvp(struct buf *bp) syncer_worklist_len--; mtx_unlock(&sync_mtx); } + bp->b_flags &= ~B_NEEDSGIANT; bp->b_vp = NULL; bp->b_bufobj = NULL; vdropl(vp); |
