summaryrefslogtreecommitdiffstats
path: root/fs
diff options
context:
space:
mode:
authorDave Chinner <dchinner@redhat.com>2014-09-02 12:12:52 +1000
committerDave Chinner <david@fromorbit.com>2014-09-02 12:12:52 +1000
commit834ffca6f7e345a79f6f2e2d131b0dfba8a4b67a (patch)
tree631b63149957d4f4a1711520b9f4e0f4401c218b /fs
parent85e584da3212140ee80fd047f9058bbee0bc00d5 (diff)
downloadop-kernel-dev-834ffca6f7e345a79f6f2e2d131b0dfba8a4b67a.zip
op-kernel-dev-834ffca6f7e345a79f6f2e2d131b0dfba8a4b67a.tar.gz
xfs: don't zero partial page cache pages during O_DIRECT writes
Similar to direct IO reads, direct IO writes are using truncate_pagecache_range to invalidate the page cache. This is incorrect due to the sub-block zeroing in the page cache that truncate_pagecache_range() triggers. This patch fixes things by using invalidate_inode_pages2_range instead. It preserves the page cache invalidation, but won't zero any pages. cc: stable@vger.kernel.org Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/xfs_file.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 827cfb2..19917fa 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -644,7 +644,15 @@ xfs_file_dio_aio_write(
pos, -1);
if (ret)
goto out;
- truncate_pagecache_range(VFS_I(ip), pos, -1);
+ /*
+ * Invalidate whole pages. This can return an error if
+ * we fail to invalidate a page, but this should never
+ * happen on XFS. Warn if it does fail.
+ */
+ ret = invalidate_inode_pages2_range(VFS_I(ip)->i_mapping,
+ pos >> PAGE_CACHE_SHIFT, -1);
+ WARN_ON_ONCE(ret);
+ ret = 0;
}
/*
OpenPOWER on IntegriCloud