On Thu, 28 Jun 2007, Dan Williams wrote: > > CONFIG_PREEMPT? > > > Everything thus far has been CONFIG_PREEMPT=n (the default for this platform). > > With CONFIG_PREEMPT=y the resync is back in the 50MB/s range.
So with upping the prio for the work queue you got back your performance? > > [iop-adma: hi-prio workqueue, CONFIG_PREEMPT=y] > iq81340mc:~# cat /proc/mdstat > Personalities : [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] > md0 : active raid5 sdd[4] sdc[2] sdb[1] sda[0] > 468872448 blocks level 5, 64k chunk, algorithm 2 [4/3] [UUU_] > [=>...................] recovery = 5.8% (9136404/156290816) > finish=46.1min speed=53161K/sec > > The tasklet configuration stays in 50MB/s ballpark, and the default > priority (nice -5) workqueue case remains in the 30's with > CONFIG_PREEMPT=n. [noted: should be CONFIG_PREEMPT=y] This is expected. Seems you may have otherthings running at a higher prio. -- Steve - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
