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authorEric Sandeen <sandeen@sandeen.net>2007-08-16 16:24:43 +1000
committerTim Shimmin <tes@chook.melbourne.sgi.com>2007-10-15 16:38:23 +1000
commit1cb51258758d725028e9ee9688d462de125a053d (patch)
tree2306dcf367cd7e105b878ddf03bd8cb9e164be7d /fs/xfs/xfs_log.c
parent40906630f18fdf5ac27f5928c20f76eeac8fb0f0 (diff)
[XFS] choose single default logbuf count & size
Remove sizing of logbuf size & count based on physical memory; this was never a very good gauge as it's looking at global memory, but deciding on sizing per-filesystem; no account is made of the total number of filesystems, for example. For now just take the largest "default" case, as was set for machines with >400MB - 8 x 32k buffers. This can always be tuned higher or lower with mount options if necessary. Removes one more user of xfs_physmem. SGI-PV: 968563 SGI-Modid: xfs-linux-melb:xfs-kern:29323a Signed-off-by: Eric Sandeen <sandeen@sandeen.net> Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_log.c')
-rw-r--r--fs/xfs/xfs_log.c33
1 files changed, 7 insertions, 26 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index db09e1ea5cf..4f4d20b2721 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -1025,10 +1025,7 @@ xlog_bdstrat_cb(struct xfs_buf *bp)
/*
* Return size of each in-core log record buffer.
*
- * Low memory machines only get 2 16KB buffers. We don't want to waste
- * memory here. However, all other machines get at least 2 32KB buffers.
- * The number is hard coded because we don't care about the minimum
- * memory size, just 32MB systems.
+ * All machines get 8 x 32KB buffers by default, unless tuned otherwise.
*
* If the filesystem blocksize is too large, we may need to choose a
* larger size since the directory code currently logs entire blocks.
@@ -1041,17 +1038,10 @@ xlog_get_iclog_buffer_size(xfs_mount_t *mp,
int size;
int xhdrs;
- if (mp->m_logbufs <= 0) {
- if (xfs_physmem <= btoc(128*1024*1024)) {
- log->l_iclog_bufs = XLOG_MIN_ICLOGS;
- } else if (xfs_physmem <= btoc(400*1024*1024)) {
- log->l_iclog_bufs = XLOG_MED_ICLOGS;
- } else { /* 256K with 32K bufs */
- log->l_iclog_bufs = XLOG_MAX_ICLOGS;
- }
- } else {
+ if (mp->m_logbufs <= 0)
+ log->l_iclog_bufs = XLOG_MAX_ICLOGS;
+ else
log->l_iclog_bufs = mp->m_logbufs;
- }
/*
* Buffer size passed in from mount system call.
@@ -1082,18 +1072,9 @@ xlog_get_iclog_buffer_size(xfs_mount_t *mp,
goto done;
}
- /*
- * Special case machines that have less than 32MB of memory.
- * All machines with more memory use 32KB buffers.
- */
- if (xfs_physmem <= btoc(32*1024*1024)) {
- /* Don't change; min configuration */
- log->l_iclog_size = XLOG_RECORD_BSIZE; /* 16k */
- log->l_iclog_size_log = XLOG_RECORD_BSHIFT;
- } else {
- log->l_iclog_size = XLOG_BIG_RECORD_BSIZE; /* 32k */
- log->l_iclog_size_log = XLOG_BIG_RECORD_BSHIFT;
- }
+ /* All machines use 32KB buffers by default. */
+ log->l_iclog_size = XLOG_BIG_RECORD_BSIZE;
+ log->l_iclog_size_log = XLOG_BIG_RECORD_BSHIFT;
/* the default log size is 16k or 32k which is one header sector */
log->l_iclog_hsize = BBSIZE;