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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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5
include/linux/jbd2.h
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@@ -1020,6 +1020,11 @@ jbd2_journal_write_metadata_buffer(transaction_t *transaction,
/* Transaction locking */
extern void __wait_on_journal (journal_t *);
/* Transaction cache support */
extern void jbd2_journal_destroy_transaction_cache(void);
extern int jbd2_journal_init_transaction_cache(void);
extern void jbd2_journal_free_transaction(transaction_t *);
/*
* Journal locking.
*