On Fri, 13 Jul 2012 00:28:00 +0300 Alexander Lyakas <alex.bolshoy@xxxxxxxxx> wrote: > Hi, > Is there any indication that can tell I am hitting this particular issue? > I think I hit something similar to that once, IOs were hang within a > raid5 and not returning. I issues w > sysrq-trigger and also have most > of the procfs/<pid> info, so is there something I can look at to > confirm? IO stops, processes get blocked in get_active_stripe(). Increasing stripe_cache_size allows a bit more IO through it eventually all fills up again. NeilBrown > > > > On Thu, Jul 12, 2012 at 7:14 AM, NeilBrown <neilb@xxxxxxx> wrote: > > On Wed, 11 Jul 2012 15:07:40 -0700 Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > > >> On Mon, Jul 09, 2012 at 02:02:30PM +1000, NeilBrown wrote: > >> > > >> > Hi Mr Stable, > >> > > >> > please apply patch > >> > > >> > commit fab363b5ff502d1b39ddcfec04271f5858d9f26e > >> > Author: Shaohua Li <shli@xxxxxxxxxx> > >> > Date: Tue Jul 3 15:57:19 2012 +1000 > >> > > >> > raid5: delayed stripe fix > >> > > >> > > >> > to 3.4.y and 3.2.y. > >> > > >> > It fixes a deadlock in RAID5 which can cause all IO to hang. > >> > It has been demonstrated to fix a real-life problem (the race is not > >> > theoretical). > >> > >> Is it also needed for 3.0.x? It seems to apply there just fine. > > > > Yes it is. Don't know why I missed that. > > I see you've already included it - thanks. > > > > NeilBrown
Attachment:
signature.asc
Description: PGP signature
