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jbd2: allocate transaction from separate slab cache

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There is normally only a handful of these active at any one time, but
putting them in a separate slab cache makes debugging memory
corruption problems easier.  Manish Katiyar also wanted this make it
easier to test memory failure scenarios in the jbd2 layer.

Cc: Manish Katiyar <mkatiyar@gmail.com>
Signed-off-by: Yongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Yongqiang Yang 2012-02-20 17:53:02 -05:00 • committed by Theodore Ts'o
parent 18aadd47f8
commit 0c2022eccb
5 changed files with 43 additions and 5 deletions
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2
fs/jbd2/commit.c
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@ -1048,7 +1048,7 @@ restart_loop:
jbd_debug(1, "JBD2: commit %d complete, head %d\n",
journal->j_commit_sequence, journal->j_tail_sequence);
if (to_free)
kfree(commit_transaction);
jbd2_journal_free_transaction(commit_transaction);
wake_up(&journal->j_wait_done_commit);
}