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| author | Michal Hocko <mhocko@suse.com> | 2016-03-14 00:38:20 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2016-03-14 00:38:20 +0300 |
| commit | 490c1b444ce653d0784a9a5fa4d11287029feeb9 (patch) | |
| tree | bfa4ea6dbd329899257c725a017ec01c82dc09d0 | |
| parent | adb7ef600cc9d9d15ecc934cc26af5c1379777df (diff) | |
| download | linux-490c1b444ce653d0784a9a5fa4d11287029feeb9.tar.xz | |
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>
| -rw-r--r-- | fs/jbd2/transaction.c | 22 |
1 files changed, 5 insertions, 17 deletions
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index 081dff087fc0..01e4652d88f6 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -966,14 +966,8 @@ repeat: if (!frozen_buffer) { JBUFFER_TRACE(jh, "allocate memory for buffer"); jbd_unlock_bh_state(bh); - frozen_buffer = jbd2_alloc(jh2bh(jh)->b_size, GFP_NOFS); - if (!frozen_buffer) { - printk(KERN_ERR "%s: OOM for frozen_buffer\n", - __func__); - JBUFFER_TRACE(jh, "oom!"); - error = -ENOMEM; - goto out; - } + frozen_buffer = jbd2_alloc(jh2bh(jh)->b_size, + GFP_NOFS | __GFP_NOFAIL); goto repeat; } jh->b_frozen_data = frozen_buffer; @@ -1226,15 +1220,9 @@ int jbd2_journal_get_undo_access(handle_t *handle, struct buffer_head *bh) goto out; repeat: - if (!jh->b_committed_data) { - committed_data = jbd2_alloc(jh2bh(jh)->b_size, GFP_NOFS); - if (!committed_data) { - printk(KERN_ERR "%s: No memory for committed data\n", - __func__); - err = -ENOMEM; - goto out; - } - } + if (!jh->b_committed_data) + committed_data = jbd2_alloc(jh2bh(jh)->b_size, + GFP_NOFS|__GFP_NOFAIL); jbd_lock_bh_state(bh); if (!jh->b_committed_data) { |