The patch titled
Subject: xfs: disable large folio support in xfile_create
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
xfs-disable-large-folio-support-in-xfile_create.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/xfs-disable-large-folio-support-in-xfile_create.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Christoph Hellwig <hch@xxxxxx>
Subject: xfs: disable large folio support in xfile_create
Date: Wed, 10 Jan 2024 10:21:09 +0100
The xfarray code will crash if large folios are force enabled using:
echo force > /sys/kernel/mm/transparent_hugepage/shmem_enabled
Fixing this will require a bit of an API change, and prefeably sorting out
the hwpoison story for pages vs folio and where it is placed in the shmem
API. For now use this one liner to disable large folios.
Link: https://lkml.kernel.org/r/20240110092109.1950011-3-hch@xxxxxx
Reported-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Cc: Chandan Babu R <chandan.babu@xxxxxxxxxx>
Cc: Christian König <christian.koenig@xxxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Cc: Dave Airlie <airlied@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Huang Rui <ray.huang@xxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
Cc: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Maxime Ripard <mripard@xxxxxxxxxx>
Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/xfs/scrub/xfile.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/fs/xfs/scrub/xfile.c~xfs-disable-large-folio-support-in-xfile_create
+++ a/fs/xfs/scrub/xfile.c
@@ -94,6 +94,11 @@ xfile_create(
lockdep_set_class(&inode->i_rwsem, &xfile_i_mutex_key);
+ /*
+ * We're not quite ready for large folios yet.
+ */
+ mapping_clear_large_folios(inode->i_mapping);
+
trace_xfile_create(xf);
*xfilep = xf;
_
Patches currently in -mm which might be from hch@xxxxxx are
mm-add-a-mapping_clear_large_folios-helper.patch
xfs-disable-large-folio-support-in-xfile_create.patch
