From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: Re: [PATCH 0/2] Modify read error handle for RAID-4,5,6. Date: Wed, 27 Jun 2012 14:32:28 +1000 Message-ID: <20120627143228.21ee4baa@notabene.brown> References: <201205261052422815923@gmail.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/j0a_i1aJG_jCqqbs=TUyfGj"; protocol="application/pgp-signature" Return-path: In-Reply-To: <201205261052422815923@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: majianpeng Cc: linux-raid List-Id: linux-raid.ids --Sig_/j0a_i1aJG_jCqqbs=TUyfGj Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Sat, 26 May 2012 10:52:50 +0800 "majianpeng" wrot= e: > When RAID-4,5,6 degraded and met read-error, it will eject the rdev.And t= hen > the RAID will fail and lost data.Because the function of set-badsector,wh= en=20 > this occur,it will set-badsector,not ejecting the rdev. > When RAID-4,5,6 met read-error, it will re-write if RAID was not degrade.= But if=20 > re-write error,it will eject the rdev and RAID will degrade and it will t= ake too > long time for recoverying.So I add judgement for controling how may re-wr= ite-error > can eject the rdev. >=20 > I do those for flexible controling the read-error for different situation. > =09 Thanks. >=20 > majianpeng (2): > md/raid456: When readed error and raid was degraded,it try to > set badsector, not ejecting the rdev. I've applied this one. I also added 'set_bad =3D 1' in the case where the re-write failed. > md/raid456:Add interface for contorling eject rdev when re-write > failed. I haven't applied this. I'm not entirely sure what the point of counting the errors was, but I don't think it is necessary. Thanks, NeilBrown >=20 > drivers/md/md.c | 35 +++++++++++++++++++++++++++++++++++ > drivers/md/md.h | 2 ++ > drivers/md/raid5.c | 28 +++++++++++++++++++--------- > 3 files changed, 56 insertions(+), 9 deletions(-) >=20 --Sig_/j0a_i1aJG_jCqqbs=TUyfGj Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) iQIVAwUBT+qM3Dnsnt1WYoG5AQKffA/+JwQ0TAZZXZ4+mjXG7TSGCkqmLomhotCT z0gfi+8KHFaxvyAamIeeJlsRAl+9iT2sDyZ2Ja1FfZsXKnCEtATMbZJQPUvmm4Fy 6QZ558gttw+oqQh9bvb4eBQbckBjDAd8KAM7CmW1zwefgO70eOWxObDzVapL3vsW q0WcG9i9OI0LyuHL9NOKj/VWSfd2ChVGBk7FArwlaQ4naHlVL0YjPWhfO0dNA1eN sJaT8tVk/FiDl3+VOK1/K4mHZuDsF4gORltr4mB80zTpi+zdeiXVTFsFD2OC1pL2 Rgy/rVqD1d8Ljx5NCrl2ZXid+BvFzgcQp/0Jad6UKxnTzGYjovY7Kj9dEYNphhV2 hzqX+va+Z3vrHeSxGAlmSorwjUYn25sPNpjCtN/c3iK7aSuwl5DbqMtMb0YklhKn it4e5JUf7cgmS/tzSgPbkYrDLaATRlxmL1g8XBlyFe/zC7iTNvyalKsqpgPq7KzH ktX/B5kuvHdN4CDdVKsB/z5ISWRXx6HAP0KfkxD0oMZ85RiFkjT60D0wQzGWRTg4 8b2iU5uWLvtRVt60JQXB0lUYozk7odIrE/NL5HaalB5xNG8ETXwsOqQYeEKYQP7w japa4x84XTudMig2kvlObL5+TojAXSUwMQzBLd2TC+KEaEdWD+X4gqOrcSD4gfmS B0IKtt7qTYw= =HvlO -----END PGP SIGNATURE----- --Sig_/j0a_i1aJG_jCqqbs=TUyfGj--