Kasper Sandberg wrote: > On Fri, 2009-12-11 at 14:26 +1100, Dave Chinner wrote: >> On Fri, Dec 11, 2009 at 02:41:32AM +0100, Asdo wrote: >>> I have checked the other problem I had which I was mentioning, that I > <snip> >>> Also with noalign and rotorstep at 255 the stripe_cache_size stays >>> usually in the lower half (below 16000 out of 32000) while with defaults >>> it's stuck for most of the time at the maximum and processes are stuck >>> sleeping in MD locks for this reason. >> That really does sound like a misaligned filesystem - the stripe >> cache will grow larger the more RMW cycles that need to be >> performed... > Sorry to interrupt, I would very much like to see if my array/xfs is > properly aligned and all that stuff which has been mentioned inhere, > could any of you please post the things required to check? filesystem is > straight on md raid6, debian lenny. > > > <snip> > use xfs_info on your mountpoint, and compare the stripe unit and width to what md tells you. xfs_info stripe unit/width output is in fs blocks units. -Eric -- 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
