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| author | Eric Sandeen <sandeen@sandeen.net> | 2007-08-16 16:24:43 +1000 |
|---|---|---|
| committer | Tim Shimmin <tes@chook.melbourne.sgi.com> | 2007-10-15 16:38:23 +1000 |
| commit | 1cb51258758d725028e9ee9688d462de125a053d (patch) | |
| tree | 2306dcf367cd7e105b878ddf03bd8cb9e164be7d /fs/xfs | |
| parent | 40906630f18fdf5ac27f5928c20f76eeac8fb0f0 (diff) | |
| download | linux-1cb51258758d725028e9ee9688d462de125a053d.tar.gz linux-1cb51258758d725028e9ee9688d462de125a053d.tar.bz2 linux-1cb51258758d725028e9ee9688d462de125a053d.zip | |
[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')
| -rw-r--r-- | fs/xfs/xfs_log.c | 33 | ||||
| -rw-r--r-- | fs/xfs/xfs_log_priv.h | 1 |
2 files changed, 7 insertions, 27 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index db09e1ea5cf3..4f4d20b2721c 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; diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 9bd3cdf11a87..e973972d4633 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -30,7 +30,6 @@ struct xfs_mount; */ #define XLOG_MIN_ICLOGS 2 -#define XLOG_MED_ICLOGS 4 #define XLOG_MAX_ICLOGS 8 #define XLOG_HEADER_MAGIC_NUM 0xFEEDbabe /* Invalid cycle number */ #define XLOG_VERSION_1 1 |