From: Jeff Mahoney <je...@suse.com>
The srcu_struct in btrfs_fs_infoa scales in size with NR_CPUS. On
kernels built with NR_CPUS=8192, this can result in kmalloc failures
that prevent mounting.
There is work in progress to try to resolve this for every user of
srcu_struct but using kvzalloc will work around the failures until
that is complete.
Signed-off-by: Jeff Mahoney <je...@suse.com>
---
fs/btrfs/ctree.h | 2 +-
fs/btrfs/super.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 1a462ab85c49..0f521ba5f2f9 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2974,7 +2974,7 @@ static inline void free_fs_info(struct btrfs_fs_info
*fs_info)
kfree(fs_info->super_copy);
kfree(fs_info->super_for_commit);
security_free_mnt_opts(&fs_info->security_opts);
- kfree(fs_info);
+ kvfree(fs_info);
}
/* tree mod log functions from ctree.c */
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 6e71a2a78363..4b817947e00f 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1545,7 +1545,7 @@ static struct dentry *btrfs_mount_root(struct
file_system_type *fs_type,
* it for searching for existing supers, so this lets us do that and
* then open_ctree will properly initialize everything later.
*/
- fs_info = kzalloc(sizeof(struct btrfs_fs_info), GFP_KERNEL);
+ fs_info = kvzalloc(sizeof(struct btrfs_fs_info), GFP_KERNEL);
if (!fs_info) {
error = -ENOMEM;
goto error_sec_opts;
--
2.15.1
--
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