lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] Manage jbd allocations from its own slabs

Browse Source 
JBD currently allocates commit and frozen buffers from slabs.  With
CONFIG_SLAB_DEBUG, its possible for an allocation to cross the page
boundary causing IO problems.

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=200127

So, instead of allocating these from regular slabs - manage allocation from
its own slabs and disable slab debug for these slabs.

[akpm@osdl.org: cleanups]
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Badari Pulavarty
2006-08-27 01:23:52 -07:00
committed by Linus Torvalds
parent 4c4d50f7b3
commit ea817398e6
4 changed files with 97 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
fs/jbd/commit.c
View File

@@ -261,7 +261,7 @@ void journal_commit_transaction(journal_t *journal)
struct buffer_head *bh = jh2bh(jh);
jbd_lock_bh_state(bh);
kfree(jh->b_committed_data);
jbd_slab_free(jh->b_committed_data, bh->b_size);
jh->b_committed_data = NULL;
jbd_unlock_bh_state(bh);
}
@@ -745,14 +745,14 @@ restart_loop:
* Otherwise, we can just throw away the frozen data now.
*/
if (jh->b_committed_data) {
kfree(jh->b_committed_data);
jbd_slab_free(jh->b_committed_data, bh->b_size);
jh->b_committed_data = NULL;
if (jh->b_frozen_data) {
jh->b_committed_data = jh->b_frozen_data;
jh->b_frozen_data = NULL;
}
} else if (jh->b_frozen_data) {
kfree(jh->b_frozen_data);
jbd_slab_free(jh->b_frozen_data, bh->b_size);
jh->b_frozen_data = NULL;
}