From 8932c2e0dcae52e73430878fd8a7a7800176eada Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Mon, 26 Jun 2006 00:27:36 -0700 Subject: [PATCH] [PATCH] md: remove arbitrary limit on chunk size 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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 --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 1440935414e6..affeaefd4033 100644 --- a/drivers/md/raid10.c +++ b/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 --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 31843604049c..122e64e557b1 100644 --- a/drivers/md/raid5.c +++ b/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 --git a/drivers/md/raid6main.c b/drivers/md/raid6main.c index bc69355e0100..e53d2d96ea3a 100644 --- a/drivers/md/raid6main.c +++ b/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 --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h index e2df61f5b09a..db2ca2d9066e 100644 --- a/include/linux/raid/md_k.h +++ b/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 -- 2.20.1