linux/fs/jbd2
Michal Hocko 490c1b444c jbd2: do not fail journal because of frozen_buffer allocation failure
Journal transaction might fail prematurely because the frozen_buffer
is allocated by GFP_NOFS request:
[   72.440013] do_get_write_access: OOM for frozen_buffer
[   72.440014] EXT4-fs: ext4_reserve_inode_write:4729: aborting transaction: Out of memory in __ext4_journal_get_write_access
[   72.440015] EXT4-fs error (device sda1) in ext4_reserve_inode_write:4735: Out of memory
(...snipped....)
[   72.495559] do_get_write_access: OOM for frozen_buffer
[   72.495560] EXT4-fs: ext4_reserve_inode_write:4729: aborting transaction: Out of memory in __ext4_journal_get_write_access
[   72.496839] do_get_write_access: OOM for frozen_buffer
[   72.496841] EXT4-fs: ext4_reserve_inode_write:4729: aborting transaction: Out of memory in __ext4_journal_get_write_access
[   72.505766] Aborting journal on device sda1-8.
[   72.505851] EXT4-fs (sda1): Remounting filesystem read-only

This wasn't a problem until "mm: page_alloc: do not lock up GFP_NOFS
allocations upon OOM" because small GPF_NOFS allocations never failed.
This allocation seems essential for the journal and GFP_NOFS is too
restrictive to the memory allocator so let's use __GFP_NOFAIL here to
emulate the previous behavior.

Signed-off-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2016-03-13 17:38:20 -04:00
..
checkpoint.c jbd2: fix checkpoint list cleanup 2015-10-17 22:35:09 -04:00
commit.c jbd2: save some atomic ops in __JI_COMMIT_RUNNING handling 2016-02-22 23:20:30 -05:00
journal.c jbd2: fix FS corruption possibility in jbd2_journal_destroy() on umount path 2016-03-09 23:47:25 -05:00
Kconfig jbd2: remove debug dependency on debug_fs and update Kconfig help text 2013-06-12 23:07:51 -04:00
Makefile
recovery.c jbd2: unify revoke and tag block checksum handling 2016-02-22 23:19:09 -05:00
revoke.c jbd2: unify revoke and tag block checksum handling 2016-02-22 23:19:09 -05:00
transaction.c jbd2: do not fail journal because of frozen_buffer allocation failure 2016-03-13 17:38:20 -04:00