10.1 mmap on zfs not updating mtime
Andriy Gapon
avg at FreeBSD.org
Mon Dec 1 08:11:17 UTC 2014
On 25/11/2014 06:23, Paul Koch wrote:
>
> Hi,
>
> we have observed some odd behaviour with the mtime of a mmap'ed file
> when it has been updated on a zfs pool. The mtime does not appear to
> be updated. Seems to work ok on UFS.
Could you please test the following simple patch?
Index: sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c
===================================================================
--- sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c (revision 275036)
+++ sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vnops.c (working copy)
@@ -5969,6 +5969,7 @@ top:
&zp->z_pflags, 8);
zfs_tstamp_update_setup(zp, CONTENT_MODIFIED, mtime, ctime,
B_TRUE);
+ (void)sa_bulk_update(zp->z_sa_hdl, bulk, count, tx);
zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, off, len, 0);
zfs_vmobject_wlock(object);
> Test program below...
>
> On 10.0, the following works ok:
>
> dd bs=1k if=/dev/zero of=mdata count=1
> ls -lT mdata; /tmp/mmap-mtime mdata; ls -lT mdata
>
> but on 10.1 the mtime stays at its creation time.
[snip]
--
Andriy Gapon
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