The patch titled
readahead: remove the limit max_sectors_kb imposed on max_readahead_kb
has been removed from the -mm tree. Its filename was
readahead-remove-the-limit-max_sectors_kb-imposed-on-max_readahead_kb.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: readahead: remove the limit max_sectors_kb imposed on max_readahead_kb
From: Fengguang Wu <wfg@xxxxxxxxxxxxxxxx>
Remove the size limit max_sectors_kb imposed on max_readahead_kb.
The size restriction is unreasonable. Especially when max_sectors_kb cannot
grow larger than max_hw_sectors_kb, which can be rather small for some disk
drives.
Cc: Jens Axboe <jens.axboe@xxxxxxxxxx>
Signed-off-by: Fengguang Wu <wfg@xxxxxxxxxxxxxxxx>
Acked-by: Jens Axboe <jens.axboe@xxxxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
block/ll_rw_blk.c | 9 ---------
1 file changed, 9 deletions(-)
diff -puN block/ll_rw_blk.c~readahead-remove-the-limit-max_sectors_kb-imposed-on-max_readahead_kb block/ll_rw_blk.c
--- a/block/ll_rw_blk.c~readahead-remove-the-limit-max_sectors_kb-imposed-on-max_readahead_kb
+++ a/block/ll_rw_blk.c
@@ -3928,7 +3928,6 @@ queue_max_sectors_store(struct request_q
max_hw_sectors_kb = q->max_hw_sectors >> 1,
page_kb = 1 << (PAGE_CACHE_SHIFT - 10);
ssize_t ret = queue_var_store(&max_sectors_kb, page, count);
- int ra_kb;
if (max_sectors_kb > max_hw_sectors_kb || max_sectors_kb < page_kb)
return -EINVAL;
@@ -3937,14 +3936,6 @@ queue_max_sectors_store(struct request_q
* values synchronously:
*/
spin_lock_irq(q->queue_lock);
- /*
- * Trim readahead window as well, if necessary:
- */
- ra_kb = q->backing_dev_info.ra_pages << (PAGE_CACHE_SHIFT - 10);
- if (ra_kb > max_sectors_kb)
- q->backing_dev_info.ra_pages =
- max_sectors_kb >> (PAGE_CACHE_SHIFT - 10);
-
q->max_sectors = max_sectors_kb << 1;
spin_unlock_irq(q->queue_lock);
_
Patches currently in -mm which might be from wfg@xxxxxxxxxxxxxxxx are
origin.patch
maps-pssproportional-set-size-accounting-in-smaps.patch
convert-ill-defined-log2-to-ilog2.patch
avoid-negative-and-full-width-shifts-in-radix-treec.patch
writeback-fix-time-ordering-of-the-per-superblock-inode-lists-8.patch
writeback-fix-ntfs-with-sb_has_dirty_inodes.patch
writeback-remove-pages_skipped-accounting-in-__block_write_full_page.patch
writeback-remove-pages_skipped-accounting-in-__block_write_full_page-fix.patch
writeback-introduce-writeback_controlmore_io-to-indicate-more-io.patch
writeback-remove-unnecessary-wait-in-throttle_vm_writeout.patch
-
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