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authorChris Mason <mason@suse.com>2006-02-01 03:06:49 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-01 08:53:26 -0800
commite0e851cf30f1a9bd2e2a7624e9810378d6a2b072 (patch)
treea8cf33d9b22594fb5c1094bd8b15f2f315b53f2d /fs/reiserfs/journal.c
parentfc5cd582e9c934ddaf6f310179488932cd154794 (diff)
downloadop-kernel-dev-e0e851cf30f1a9bd2e2a7624e9810378d6a2b072.zip
op-kernel-dev-e0e851cf30f1a9bd2e2a7624e9810378d6a2b072.tar.gz
[PATCH] reiserfs: reiserfs hang and performance fix for data=journal mode
In data=journal mode, reiserfs writepage needs to make sure not to trigger transactions while being run under PF_MEMALLOC. This patch makes sure to redirty the page instead of forcing a transaction start in this case. Also, calling filemap_fdata* in order to trigger io on the block device can cause lock inversions on the page lock. Instead, do simple batching from flush_commit_list. Signed-off-by: Chris Mason <mason@suse.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/reiserfs/journal.c')
-rw-r--r--fs/reiserfs/journal.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index bc8fe96..1b2402a 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -988,6 +988,7 @@ static int flush_commit_list(struct super_block *s,
struct reiserfs_journal *journal = SB_JOURNAL(s);
int barrier = 0;
int retval = 0;
+ int write_len;
reiserfs_check_lock_depth(s, "flush_commit_list");
@@ -1037,16 +1038,24 @@ static int flush_commit_list(struct super_block *s,
BUG_ON(!list_empty(&jl->j_bh_list));
/*
* for the description block and all the log blocks, submit any buffers
- * that haven't already reached the disk
+ * that haven't already reached the disk. Try to write at least 256
+ * log blocks. later on, we will only wait on blocks that correspond
+ * to this transaction, but while we're unplugging we might as well
+ * get a chunk of data on there.
*/
atomic_inc(&journal->j_async_throttle);
- for (i = 0; i < (jl->j_len + 1); i++) {
+ write_len = jl->j_len + 1;
+ if (write_len < 256)
+ write_len = 256;
+ for (i = 0 ; i < write_len ; i++) {
bn = SB_ONDISK_JOURNAL_1st_BLOCK(s) + (jl->j_start + i) %
SB_ONDISK_JOURNAL_SIZE(s);
tbh = journal_find_get_block(s, bn);
- if (buffer_dirty(tbh)) /* redundant, ll_rw_block() checks */
- ll_rw_block(SWRITE, 1, &tbh);
- put_bh(tbh);
+ if (tbh) {
+ if (buffer_dirty(tbh))
+ ll_rw_block(WRITE, 1, &tbh) ;
+ put_bh(tbh) ;
+ }
}
atomic_dec(&journal->j_async_throttle);
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