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When the softdep conversion took place, the periodic vfs_msync() from

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update got lost.  This is responsible for ensuring that dirty mmap() pages
get periodically written to disk.  Without it, long time mmap's might not
have their dirty pages written out at all of the system crashes or isn't
cleanly shut down.  This could be nasty if you've got a long-running
writing via mmap(), dirty pages used to get written to disk within 30
seconds or so.
This commit is contained in:
Peter Wemm 1998-04-16 03:31:26 +00:00
parent 3cfe146f65
commit efdc5523c0
2 changed files with 4 additions and 2 deletions
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3
sys/kern/vfs_export.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
* $Id: vfs_subr.c,v 1.148 1998/03/30 09:51:08 phk Exp $
* $Id: vfs_subr.c,v 1.149 1998/04/15 18:37:49 tegge Exp $
*/
/*
@ -2744,6 +2744,7 @@ sync_fsync(ap)
}
asyncflag = mp->mnt_flag & MNT_ASYNC;
mp->mnt_flag &= ~MNT_ASYNC;
vfs_msync(mp, MNT_NOWAIT);
VFS_SYNC(mp, MNT_LAZY, ap->a_cred, p);
if (asyncflag)
mp->mnt_flag |= MNT_ASYNC;

3
sys/kern/vfs_subr.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
* $Id: vfs_subr.c,v 1.148 1998/03/30 09:51:08 phk Exp $
* $Id: vfs_subr.c,v 1.149 1998/04/15 18:37:49 tegge Exp $
*/
/*
@ -2744,6 +2744,7 @@ sync_fsync(ap)
}
asyncflag = mp->mnt_flag & MNT_ASYNC;
mp->mnt_flag &= ~MNT_ASYNC;
vfs_msync(mp, MNT_NOWAIT);
VFS_SYNC(mp, MNT_LAZY, ap->a_cred, p);
if (asyncflag)
mp->mnt_flag |= MNT_ASYNC;