diff options
| author | tegge <tegge@FreeBSD.org> | 2006-09-26 04:15:59 +0000 |
|---|---|---|
| committer | tegge <tegge@FreeBSD.org> | 2006-09-26 04:15:59 +0000 |
| commit | f42473d76b149849661d41c1f44a36dd01096d40 (patch) | |
| tree | 3bc9361221d5a734023278052dddd20fb2025bee /sys/kern/vfs_extattr.c | |
| parent | b500b0ae92746b6a7309c0f88afadb7c588fd859 (diff) | |
| download | FreeBSD-src-f42473d76b149849661d41c1f44a36dd01096d40.zip FreeBSD-src-f42473d76b149849661d41c1f44a36dd01096d40.tar.gz | |
Add mnt_noasync counter to better handle interleaved calls to nmount(),
sync() and sync_fsync() without losing MNT_ASYNC. Add MNTK_ASYNC flag
which is set only when MNT_ASYNC is set and mnt_noasync is zero, and
check that flag instead of MNT_ASYNC before initiating async io.
Diffstat (limited to 'sys/kern/vfs_extattr.c')
| -rw-r--r-- | sys/kern/vfs_extattr.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/sys/kern/vfs_extattr.c b/sys/kern/vfs_extattr.c index 147b31e..d23f19b 100644 --- a/sys/kern/vfs_extattr.c +++ b/sys/kern/vfs_extattr.c @@ -122,7 +122,6 @@ sync(td, uap) { struct mount *mp, *nmp; int vfslocked; - int asyncflag; mtx_lock(&mountlist_mtx); for (mp = TAILQ_FIRST(&mountlist); mp != NULL; mp = nmp) { @@ -134,13 +133,16 @@ sync(td, uap) if ((mp->mnt_flag & MNT_RDONLY) == 0 && vn_start_write(NULL, &mp, V_NOWAIT) == 0) { MNT_ILOCK(mp); - asyncflag = mp->mnt_flag & MNT_ASYNC; - mp->mnt_flag &= ~MNT_ASYNC; + mp->mnt_noasync++; + mp->mnt_kern_flag &= ~MNTK_ASYNC; MNT_IUNLOCK(mp); vfs_msync(mp, MNT_NOWAIT); VFS_SYNC(mp, MNT_NOWAIT, td); MNT_ILOCK(mp); - mp->mnt_flag |= asyncflag; + mp->mnt_noasync--; + if ((mp->mnt_flag & MNT_ASYNC) != 0 && + mp->mnt_noasync == 0) + mp->mnt_kern_flag |= MNTK_ASYNC; MNT_IUNLOCK(mp); vn_finished_write(mp); } |
