This is a note to let you know that I've just added the patch titled
btrfs: fix slab cache flags for free space tree bitmap
to the 5.10-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:
btrfs-fix-slab-cache-flags-for-free-space-tree-bitmap.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 34e49994d0dcdb2d31d4d2908d04f4e9ce57e4d7 Mon Sep 17 00:00:00 2001
From: David Sterba <dsterba@xxxxxxxx>
Date: Mon, 15 Mar 2021 15:18:24 +0100
Subject: btrfs: fix slab cache flags for free space tree bitmap
From: David Sterba <dsterba@xxxxxxxx>
commit 34e49994d0dcdb2d31d4d2908d04f4e9ce57e4d7 upstream.
The free space tree bitmap slab cache is created with SLAB_RED_ZONE but
that's a debugging flag and not always enabled. Also the other slabs are
created with at least SLAB_MEM_SPREAD that we want as well to average
the memory placement cost.
Reported-by: Vlastimil Babka <vbabka@xxxxxxx>
Fixes: 3acd48507dc4 ("btrfs: fix allocation of free space cache v1 bitmap pages")
CC: stable@xxxxxxxxxxxxxxx # 5.4+
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8811,7 +8811,7 @@ int __init btrfs_init_cachep(void)
btrfs_free_space_bitmap_cachep = kmem_cache_create("btrfs_free_space_bitmap",
PAGE_SIZE, PAGE_SIZE,
- SLAB_RED_ZONE, NULL);
+ SLAB_MEM_SPREAD, NULL);
if (!btrfs_free_space_bitmap_cachep)
goto fail;
Patches currently in stable-queue which might be from dsterba@xxxxxxxx are
queue-5.10/btrfs-fix-slab-cache-flags-for-free-space-tree-bitmap.patch
queue-5.10/btrfs-fix-race-when-cloning-extent-buffer-during-rewind-of-an-old-root.patch
