Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=89918647a445fddfe223b097e29f775dcfa81eab
Commit: 89918647a445fddfe223b097e29f775dcfa81eab
Parent: 1990e917651d58a3c5155d0491431c09e29e385b
Author: Steven Whitehouse <[EMAIL PROTECTED]>
AuthorDate: Fri Jun 1 15:19:33 2007 +0100
Committer: Steven Whitehouse <[EMAIL PROTECTED]>
CommitDate: Mon Jul 9 08:23:03 2007 +0100
[GFS2] Make the log reserved blocks depend on block size
The number of blocks which we reserve in the log at the start of each
transaction needs to depends upon the block size since the overhead is
related to the number of "pointers" which can be fitted into a single
block.
This relates to Red Hat bz #240435
Signed-off-by: Steven Whitehouse <[EMAIL PROTECTED]>
---
fs/gfs2/log.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index 291415d..586923d 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -262,7 +262,7 @@ static void ail2_empty(struct gfs2_sbd *sdp, unsigned int
new_tail)
* @sdp: The GFS2 superblock
* @blks: The number of blocks to reserve
*
- * Note that we never give out the last 6 blocks of the journal. Thats
+ * Note that we never give out the last few blocks of the journal. Thats
* due to the fact that there is are a small number of header blocks
* associated with each log flush. The exact number can't be known until
* flush time, so we ensure that we have just enough free blocks at all
@@ -274,6 +274,7 @@ static void ail2_empty(struct gfs2_sbd *sdp, unsigned int
new_tail)
int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks)
{
unsigned int try = 0;
+ unsigned reserved_blks = 6 * (4096 / sdp->sd_vfs->s_blocksize);
if (gfs2_assert_warn(sdp, blks) ||
gfs2_assert_warn(sdp, blks <= sdp->sd_jdesc->jd_blocks))
@@ -281,7 +282,7 @@ int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int
blks)
mutex_lock(&sdp->sd_log_reserve_mutex);
gfs2_log_lock(sdp);
- while(sdp->sd_log_blks_free <= (blks + 6)) {
+ while(sdp->sd_log_blks_free <= (blks + reserved_blks)) {
gfs2_log_unlock(sdp);
gfs2_ail1_empty(sdp, 0);
gfs2_log_flush(sdp, NULL);
-
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