This is a note to let you know that I've just added the patch titled
gfs2: Put bitmap buffers in put_super
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
gfs2-put-bitmap-buffers-in-put_super.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 10283ea525d30f2e99828978fd04d8427876a7ad Mon Sep 17 00:00:00 2001
From: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Date: Mon, 5 Nov 2018 22:57:24 +0000
Subject: gfs2: Put bitmap buffers in put_super
From: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
commit 10283ea525d30f2e99828978fd04d8427876a7ad upstream.
gfs2_put_super calls gfs2_clear_rgrpd to destroy the gfs2_rgrpd objects
attached to the resource group glocks. That function should release the
buffers attached to the gfs2_bitmap objects (bi_bh), but the call to
gfs2_rgrp_brelse for doing that is missing.
When gfs2_releasepage later runs across these buffers which are still
referenced, it refuses to free them. This causes the pages the buffers
are attached to to remain referenced as well. With enough mount/unmount
cycles, the system will eventually run out of memory.
Fix this by adding the missing call to gfs2_rgrp_brelse in
gfs2_clear_rgrpd.
(Also fix a gfs2_rgrp_relse -> gfs2_rgrp_brelse typo in a comment.)
Fixes: 39b0f1e92908 ("GFS2: Don't brelse rgrp buffer_heads every allocation")
Cc: stable@xxxxxxxxxxxxxxx # v4.2+
Signed-off-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/gfs2/rgrp.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -725,6 +725,7 @@ void gfs2_clear_rgrpd(struct gfs2_sbd *s
if (gl) {
glock_clear_object(gl, rgd);
+ gfs2_rgrp_brelse(rgd);
gfs2_glock_put(gl);
}
@@ -1141,7 +1142,7 @@ static u32 count_unlinked(struct gfs2_rg
* @rgd: the struct gfs2_rgrpd describing the RG to read in
*
* Read in all of a Resource Group's header and bitmap blocks.
- * Caller must eventually call gfs2_rgrp_relse() to free the bitmaps.
+ * Caller must eventually call gfs2_rgrp_brelse() to free the bitmaps.
*
* Returns: errno
*/
Patches currently in stable-queue which might be from agruenba@xxxxxxxxxx are
queue-4.19/gfs2-fix-metadata-read-ahead-during-truncate-2.patch
queue-4.19/gfs2-put-bitmap-buffers-in-put_super.patch
