diff options
| author | Ed Cashin <ecashin@coraid.com> | 2012-12-17 16:03:32 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-17 17:15:23 -0800 |
| commit | aa304fdefa568d63c862df7abe55d39811845c7c (patch) | |
| tree | d96b9161f58e913baae3031b6512a534b036d98b /drivers | |
| parent | 4ba9aa7f9819bafb304f09dee90bb1fa40627358 (diff) | |
aoe: support larger I/O requests via aoe_maxsectors module param
The GPFS filesystem is an example of an aoe user that requires the aoe
driver to support I/O request sizes larger than the default. Most users
will not need large I/O request sizes, because they would need to be split
up into multiple AoE commands anyway.
Signed-off-by: Ed Cashin <ecashin@coraid.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/aoe/aoeblk.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c index 00dfc5008ad4..d5aa3b8c9f33 100644 --- a/drivers/block/aoe/aoeblk.c +++ b/drivers/block/aoe/aoeblk.c @@ -16,11 +16,18 @@ #include <linux/netdevice.h> #include <linux/mutex.h> #include <linux/export.h> +#include <linux/moduleparam.h> #include "aoe.h" static DEFINE_MUTEX(aoeblk_mutex); static struct kmem_cache *buf_pool_cache; +/* GPFS needs a larger value than the default. */ +static int aoe_maxsectors; +module_param(aoe_maxsectors, int, 0644); +MODULE_PARM_DESC(aoe_maxsectors, + "When nonzero, set the maximum number of sectors per I/O request"); + static ssize_t aoedisk_show_state(struct device *dev, struct device_attribute *attr, char *page) { @@ -248,6 +255,8 @@ aoeblk_gdalloc(void *vp) d->blkq = gd->queue = q; q->queuedata = d; d->gd = gd; + if (aoe_maxsectors) + blk_queue_max_hw_sectors(q, aoe_maxsectors); gd->major = AOE_MAJOR; gd->first_minor = d->sysminor; gd->fops = &aoe_bdops; |