From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: RAID5: failing an active component during spare rebuild - arrays hangs Date: Wed, 7 Dec 2011 08:21:03 +1100 Message-ID: <20111207082103.0f86b3d6@notabene.brown> References: <20110622125409.14428883@notabene.brown> <20110628122921.42480f72@notabene.brown> <20110831124646.21be9e25@notabene.brown> <20111206141608.0cca224a@notabene.brown> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/0hcQVmwaZ+_AkF+FdfODV_r"; protocol="application/pgp-signature" Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Alexander Lyakas Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/0hcQVmwaZ+_AkF+FdfODV_r Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On Tue, 6 Dec 2011 23:07:53 +0200 Alexander Lyakas wrote: > Thanks, Neil!!! > Looks like this patch solves the issue. I applied it manually though, > for some reason git refused to apply it. >=20 > Thanks again for great help, > Alex. Great. Thanks for the confirmation. NeilBrown >=20 >=20 > On Tue, Dec 6, 2011 at 5:16 AM, NeilBrown wrote: > > On Sun, 27 Nov 2011 11:56:17 +0200 Alexander Lyakas > > wrote: > > > >> Hello Neil, > >> we have compiled the natty kernel with dynamic debugging enabled for > >> raid456, and reproduced the problem. > >> The kernel log is available at > >> https://docs.google.com/open?id=3D0B9rmyUifdvMLMzk1YjYwZDUtYzhhYi00MDR= lLTkzYjItMDM0Y2ZhZmU3ZDRk > >> > >> Some more information: > >> - array was created at Nov 27 11:28:03 > >> - manual drive failure was issued at 11:28:09 > >> > >> Please let me know if you need any additional information. > >> > > > > Hi, > > =A0sorry for the long delay, I've had a lot of distractions this past w= eek. > > > > I looks like you are hitting the bug fixed by upstream commit > > =A0 =A0355840e7a7e56bb2834fd3b0da64da5465f8aeaa > > > > The symptoms are slightly different to those described in that commit b= ut I'm > > sure the root problem is the same. > > > > That patch doesn't apply to 2.6.38 though. > > Use this one. > > > > NeilBrown > > > > diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c > > index 78536fd..8144126 100644 > > --- a/drivers/md/raid5.c > > +++ b/drivers/md/raid5.c > > @@ -3086,7 +3086,7 @@ static void handle_stripe5(struct stripe_head *sh) > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0/* Not in-sync */; > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0else if (test_bit(In_sync, &rdev->flags)) > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0set_bit(R5_Insync, &dev-= >flags); > > - =A0 =A0 =A0 =A0 =A0 =A0 =A0 else { > > + =A0 =A0 =A0 =A0 =A0 =A0 =A0 else if (!test_bit(Faulty, &rdev->flags))= { > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0/* could be in-sync depe= nding on recovery/reshape status */ > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0if (sh->sector + STRIPE_= SECTORS <=3D rdev->recovery_offset) > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0set_bit(= R5_Insync, &dev->flags); > > @@ -3377,7 +3377,7 @@ static void handle_stripe6(struct stripe_head *sh) > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0/* Not in-sync */; > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0else if (test_bit(In_sync, &rdev->flags)) > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0set_bit(R5_Insync, &dev-= >flags); > > - =A0 =A0 =A0 =A0 =A0 =A0 =A0 else { > > + =A0 =A0 =A0 =A0 =A0 =A0 =A0 else if (!test_bit(Faulty, &rdev->flags))= { > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0/* in sync if before rec= overy_offset */ > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0if (sh->sector + STRIPE_= SECTORS <=3D rdev->recovery_offset) > > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0set_bit(= R5_Insync, &dev->flags); --Sig_/0hcQVmwaZ+_AkF+FdfODV_r Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) iQIVAwUBTt6HPznsnt1WYoG5AQJi2A//d2/am2K7Gr+oTm3hTHsNmWRGXQR7tpS5 aXVkrQBrdfYuhB7Ialy8GZASD28wLhF5wQwST1ydVHXFg15crRGDWP2jpVKFTCD3 vOwezFs49jFpun7VfSiFuXn+9Yjdz8JAO40oDymEA+/1YcOo7zqNInEzJefnldlW 5inoiL/rxNQD5e0O0SnDRli6qoJWvR/48NmFaEXbsmoXcpGd2+Vz3l1FzIP1gFiy QkkRrg1OVf/QfZcHrGr3yiFRvODxy0YIYGMtbk2OYAG5Fn9L0jYxkotxx0rrFKTB gj3IagzWSwh7L/crhPlkHAZoWIdpdUGrCvYmOvXqeAOcGHyJQG/5HKpTRlcYfOqL EYRWU+u9u6vJ0YNJYupuvjQ0WSyiYt5+cX46yjAUvPasB7DXbLi6fd6qd4X7TGp+ G6oXnASpgiTuYb1FJPyjffCikS45V/xHfdcUC1/vhscrPXqhp2hpBZtE2AkGCkj/ l8RyjfL5bIwlpsbMqPKTkAUxxFxwmtrR8r5mp+iFJcyzluj+kZuKYBgfMHzbaoXP Kr1AEcUVBes8mmX9GiJH+fCh/OdeUibXRSXZNlsLmeBbT7zs32tb8k6/3+oBLGJI 0P/n8iJQBTtm3rI+O/UUl1BKF2hYhEMwbvO2XfpJzusHtnxamCXkkvcTJblLSqLM BchDONYYj5U= =LGRG -----END PGP SIGNATURE----- --Sig_/0hcQVmwaZ+_AkF+FdfODV_r--