| Message ID | 166153427440.2758201.6709480562966161512.stgit@dwillia2-xfh.jf.intel.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | mm, xfs, dax: Fixes for memory_failure() handling | expand |
On Fri, Aug 26, 2022 at 10:17:54AM -0700, Dan Williams wrote: > XFS always registers dax_holder_operations regardless of whether the > filesystem is capable of handling the notifications. The expectation is > that if the notify_failure handler cannot run then there are no > scenarios where it needs to run. In other words the expected semantic is > that page->index and page->mapping are valid for memory_failure() when > the conditions that cause -EOPNOTSUPP in xfs_dax_notify_failure() are > present. > > A fallback to the generic memory_failure() path is expected so do not > warn when that happens. Looks good: Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/xfs/xfs_notify_failure.c b/fs/xfs/xfs_notify_failure.c index 69d9c83ea4b2..01e2721589c4 100644 --- a/fs/xfs/xfs_notify_failure.c +++ b/fs/xfs/xfs_notify_failure.c @@ -181,7 +181,7 @@ xfs_dax_notify_failure( } if (mp->m_rtdev_targp && mp->m_rtdev_targp->bt_daxdev == dax_dev) { - xfs_warn(mp, + xfs_debug(mp, "notify_failure() not supported on realtime device!"); return -EOPNOTSUPP; } @@ -194,7 +194,7 @@ xfs_dax_notify_failure( } if (!xfs_has_rmapbt(mp)) { - xfs_warn(mp, "notify_failure() needs rmapbt enabled!"); + xfs_debug(mp, "notify_failure() needs rmapbt enabled!"); return -EOPNOTSUPP; }
XFS always registers dax_holder_operations regardless of whether the filesystem is capable of handling the notifications. The expectation is that if the notify_failure handler cannot run then there are no scenarios where it needs to run. In other words the expected semantic is that page->index and page->mapping are valid for memory_failure() when the conditions that cause -EOPNOTSUPP in xfs_dax_notify_failure() are present. A fallback to the generic memory_failure() path is expected so do not warn when that happens. Fixes: 6f643c57d57c ("xfs: implement ->notify_failure() for XFS") Cc: Shiyang Ruan <ruansy.fnst@fujitsu.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Darrick J. Wong <djwong@kernel.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Dave Chinner <david@fromorbit.com> Cc: Goldwyn Rodrigues <rgoldwyn@suse.de> Cc: Jane Chu <jane.chu@oracle.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Naoya Horiguchi <naoya.horiguchi@nec.com> Cc: Ritesh Harjani <riteshh@linux.ibm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com> --- fs/xfs/xfs_notify_failure.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)