The patch titled Subject: aoe: support larger I/O requests via aoe_maxsectors module param has been added to the -mm tree. Its filename is aoe-support-larger-i-o-requests-via-aoe_maxsectors-module-param.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Ed Cashin <ecashin@xxxxxxxxxx> Subject: 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@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/block/aoe/aoeblk.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff -puN drivers/block/aoe/aoeblk.c~aoe-support-larger-i-o-requests-via-aoe_maxsectors-module-param drivers/block/aoe/aoeblk.c --- a/drivers/block/aoe/aoeblk.c~aoe-support-larger-i-o-requests-via-aoe_maxsectors-module-param +++ a/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; _ Patches currently in -mm which might be from ecashin@xxxxxxxxxx are linux-compilerh-add-__must_hold-macro-for-functions-called-with-a-lock-held.patch aoe-describe-the-behavior-of-the-err-character-device.patch aoe-print-warning-regarding-a-common-reason-for-dropped-transmits.patch aoe-update-cap-on-outstanding-commands-based-on-config-query-response.patch aoe-support-the-forgetting-flushing-of-a-user-specified-aoe-target.patch aoe-support-larger-i-o-requests-via-aoe_maxsectors-module-param.patch aoe-payload-sysfs-file-exports-per-aoe-command-data-transfer-size.patch aoe-cleanup-remove-unused-ata_scnt-function.patch aoe-whitespace-cleanup.patch aoe-update-driver-internal-version-number-to-60.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html