aoe: support larger I/O requests via aoe_maxsectors module param (aa304fde) · Commits · 戴 / test

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>

drivers/block/aoe/aoeblk.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -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;

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