diff options
| author | dillon <dillon@FreeBSD.org> | 2001-11-05 18:48:54 +0000 |
|---|---|---|
| committer | dillon <dillon@FreeBSD.org> | 2001-11-05 18:48:54 +0000 |
| commit | 1147eaf58a59e2d2aa15fb9395dc939c237e6269 (patch) | |
| tree | de03e156782fad9ffef4684a7cf3f1908967e835 /sys/kern/vfs_cluster.c | |
| parent | 815c903d62ca6edef2915e089d29443365138986 (diff) | |
| download | FreeBSD-src-1147eaf58a59e2d2aa15fb9395dc939c237e6269.zip FreeBSD-src-1147eaf58a59e2d2aa15fb9395dc939c237e6269.tar.gz | |
Implement IO_NOWDRAIN and B_NOWDRAIN - prevents the buffer cache from blocking
in wdrain during a write. This flag needs to be used in devices whos
strategy routines turn-around and issue another high level I/O, such as
when MD turns around and issues a VOP_WRITE to vnode backing store, in order
to avoid deadlocking the dirty buffer draining code.
Remove a vprintf() warning from MD when the backing vnode is found to be
in-use. The syncer of buf_daemon could be flushing the backing vnode at
the time of an MD operation so the warning is not correct.
MFC after: 1 week
Diffstat (limited to 'sys/kern/vfs_cluster.c')
| -rw-r--r-- | sys/kern/vfs_cluster.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/kern/vfs_cluster.c b/sys/kern/vfs_cluster.c index 0af9fed..ff1176a 100644 --- a/sys/kern/vfs_cluster.c +++ b/sys/kern/vfs_cluster.c @@ -836,7 +836,7 @@ cluster_wbuild(vp, size, start_lbn, len) bp->b_data = (char *)((vm_offset_t)bp->b_data | ((vm_offset_t)tbp->b_data & PAGE_MASK)); bp->b_flags |= B_CLUSTER | - (tbp->b_flags & (B_VMIO | B_NEEDCOMMIT)); + (tbp->b_flags & (B_VMIO | B_NEEDCOMMIT | B_NOWDRAIN)); bp->b_iodone = cluster_callback; pbgetvp(vp, bp); /* |
