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[XFS] Remove m_nreadaheads 

m_nreadaheads in the mount struct is never used; remove it and the various
macros assigned to it. Also remove a couple other unused macros in the
same areas.

Removes one user of xfs_physmem.

SGI-PV: 968563
SGI-Modid: xfs-linux-melb:xfs-kern:29322a

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
This commit is contained in:
Eric Sandeen 2007-08-16 16:24:31 +10:00 committed by Tim Shimmin
parent cd8b0a97bd
commit 40906630f1
4 changed files with 0 additions and 42 deletions
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5
fs/xfs/linux-2.6/xfs_lrw.h
View File

@ -71,11 +71,6 @@ extern void xfs_inval_cached_trace(struct xfs_iocore *,
#define xfs_inval_cached_trace(io, offset, len, first, last)
#endif
/*
* Maximum count of bmaps used by read and write paths.
*/
#define XFS_MAX_RW_NBMAPS 4
extern int xfs_bmap(struct bhv_desc *, xfs_off_t, ssize_t, int,
struct xfs_iomap *, int *);
extern int xfsbdstrat(struct xfs_mount *, struct xfs_buf *);

10
fs/xfs/xfs_mount.c
View File

@ -871,16 +871,6 @@ xfs_mountfs(
writeio_log = mp->m_writeio_log;
}
/*
* Set the number of readahead buffers to use based on
* physical memory size.
*/
if (xfs_physmem <= 4096) /* <= 16MB */
mp->m_nreadaheads = XFS_RW_NREADAHEAD_16MB;
else if (xfs_physmem <= 8192) /* <= 32MB */
mp->m_nreadaheads = XFS_RW_NREADAHEAD_32MB;
else
mp->m_nreadaheads = XFS_RW_NREADAHEAD_K32;
if (sbp->sb_blocklog > readio_log) {
mp->m_readio_log = sbp->sb_blocklog;
} else {

1
fs/xfs/xfs_mount.h
View File

@ -362,7 +362,6 @@ typedef struct xfs_mount {
__uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
__uint8_t m_agno_log; /* log #ag's */
__uint8_t m_agino_log; /* #bits for agino in inum */
__uint8_t m_nreadaheads; /* #readahead buffers */
__uint16_t m_inode_cluster_size;/* min inode buf size */
uint m_blockmask; /* sb_blocksize-1 */
uint m_blockwsize; /* sb_blocksize in words */

26
fs/xfs/xfs_rw.h
View File

@ -22,32 +22,6 @@ struct xfs_buf;
struct xfs_inode;
struct xfs_mount;
/*
* Maximum count of bmaps used by read and write paths.
*/
#define XFS_MAX_RW_NBMAPS 4
/*
* Counts of readahead buffers to use based on physical memory size.
* None of these should be more than XFS_MAX_RW_NBMAPS.
*/
#define XFS_RW_NREADAHEAD_16MB 2
#define XFS_RW_NREADAHEAD_32MB 3
#define XFS_RW_NREADAHEAD_K32 4
#define XFS_RW_NREADAHEAD_K64 4
/*
* Maximum size of a buffer that we\'ll map. Making this
* too big will degrade performance due to the number of
* pages which need to be gathered. Making it too small
* will prevent us from doing large I/O\'s to hardware that
* needs it.
*
* This is currently set to 512 KB.
*/
#define XFS_MAX_BMAP_LEN_BB 1024
#define XFS_MAX_BMAP_LEN_BYTES 524288
/*
* Convert the given file system block to a disk block.
* We have to treat it differently based on whether the