On 07/05/12 16:04, Bernd Schubert wrote: > I think you need something like this. I thought there already went > something in in recent kernel, will check it later on today. > > > > Index: 2.6.32.13/drivers/md/raid0.c > =================================================================== > --- 2.6.32.13.orig/drivers/md/raid0.c > +++ 2.6.32.13/drivers/md/raid0.c > @@ -96,6 +96,7 @@ static int create_strip_zones(mddev_t *m > int cnt; > char b[BDEVNAME_SIZE]; > raid0_conf_t *conf = kzalloc(sizeof(*conf), GFP_KERNEL); > + unsigned int opt_io_size; > > if (!conf) > return -ENOMEM; > @@ -256,9 +257,16 @@ static int create_strip_zones(mddev_t *m > goto abort; > } > > + /* > + * To send large IOs to the drives we need sufficient segments > + * for our own queue first. > + */ > + opt_io_size = (mddev->chunk_sectors << 9) * mddev->raid_disks; > + blk_queue_max_phys_segments(mddev->queue, opt_io_size >> PAGE_SHIFT); > + blk_queue_max_hw_segments(mddev->queue, opt_io_size >> PAGE_SHIFT); > + > blk_queue_io_min(mddev->queue, mddev->chunk_sectors << 9); > - blk_queue_io_opt(mddev->queue, > - (mddev->chunk_sectors << 9) * mddev->raid_disks); > + blk_queue_io_opt(mddev->queue, opt_io_size); > > printk(KERN_INFO "raid0: done.\n"); > mddev->private = conf; > > > Cheers, > Bernd > Thanks for your answer, Bernd! I've tested 3.3 and 3.4-rc1 and there it works. Now, I'll test latest linux-3.2.y from linux-stable. Perhaps I'll start a "git bisect" later on if the fix commit isn't that obvious. Cheers, Sebastian -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
