The patch titled
md: remove arbitrary limit on chunk size
has been removed from the -mm tree. Its filename is
md-remove-arbitrary-limit-on-chunk-size.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: md: remove arbitrary limit on chunk size
From: NeilBrown <neilb@xxxxxxx>
The largest chunk size the code can support without substantial surgery is
2^30 bytes, so make that the limit instead of an arbitrary 4Meg. Some day,
the 'chunksize' should change to a sector-shift instead of a byte-count. Then
no limit would be needed.
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/md/raid10.c | 2 +-
drivers/md/raid5.c | 4 ++--
drivers/md/raid6main.c | 4 ++--
include/linux/raid/md_k.h | 3 ++-
4 files changed, 7 insertions(+), 6 deletions(-)
diff -puN drivers/md/raid10.c~md-remove-arbitrary-limit-on-chunk-size drivers/md/raid10.c
--- a/drivers/md/raid10.c~md-remove-arbitrary-limit-on-chunk-size
+++ a/drivers/md/raid10.c
@@ -2050,7 +2050,7 @@ static int run(mddev_t *mddev)
* maybe...
*/
{
- int stripe = conf->raid_disks * mddev->chunk_size / PAGE_SIZE;
+ int stripe = conf->raid_disks * (mddev->chunk_size / PAGE_SIZE);
stripe /= conf->near_copies;
if (mddev->queue->backing_dev_info.ra_pages < 2* stripe)
mddev->queue->backing_dev_info.ra_pages = 2* stripe;
diff -puN drivers/md/raid5.c~md-remove-arbitrary-limit-on-chunk-size drivers/md/raid5.c
--- a/drivers/md/raid5.c~md-remove-arbitrary-limit-on-chunk-size
+++ a/drivers/md/raid5.c
@@ -2382,8 +2382,8 @@ static int run(mddev_t *mddev)
* 2 * (n-1) * chunksize where 'n' is the number of raid devices
*/
{
- int stripe = (mddev->raid_disks-1) * mddev->chunk_size
- / PAGE_SIZE;
+ int stripe = (mddev->raid_disks-1) *
+ (mddev->chunk_size / PAGE_SIZE);
if (mddev->queue->backing_dev_info.ra_pages < 2 * stripe)
mddev->queue->backing_dev_info.ra_pages = 2 * stripe;
}
diff -puN drivers/md/raid6main.c~md-remove-arbitrary-limit-on-chunk-size drivers/md/raid6main.c
--- a/drivers/md/raid6main.c~md-remove-arbitrary-limit-on-chunk-size
+++ a/drivers/md/raid6main.c
@@ -2135,8 +2135,8 @@ static int run(mddev_t *mddev)
* 2 * (n-2) * chunksize where 'n' is the number of raid devices
*/
{
- int stripe = (mddev->raid_disks-2) * mddev->chunk_size
- / PAGE_SIZE;
+ int stripe = (mddev->raid_disks-2) *
+ (mddev->chunk_size / PAGE_SIZE);
if (mddev->queue->backing_dev_info.ra_pages < 2 * stripe)
mddev->queue->backing_dev_info.ra_pages = 2 * stripe;
}
diff -puN include/linux/raid/md_k.h~md-remove-arbitrary-limit-on-chunk-size include/linux/raid/md_k.h
--- a/include/linux/raid/md_k.h~md-remove-arbitrary-limit-on-chunk-size
+++ a/include/linux/raid/md_k.h
@@ -40,7 +40,8 @@ typedef struct mdk_rdev_s mdk_rdev_t;
* options passed in raidrun:
*/
-#define MAX_CHUNK_SIZE (4096*1024)
+/* Currently this must fix in an 'int' */
+#define MAX_CHUNK_SIZE (1<<30)
/*
* MD's 'extended' device
_
Patches currently in -mm which might be from neilb@xxxxxxx are
origin.patch
generic_file_buffered_write-deadlock-on-vectored-write.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
lockdep-annotate-sunrpc-code.patch
-
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