From: tirumalareddy marri Subject: Re: 64k Page size + ext3 errors Date: Mon, 28 Jul 2008 16:29:23 -0700 (PDT) Message-ID: <590218.14781.qm@web81301.mail.mud.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-raid@vger.kernel.org, linux-ext4@vger.kernel.org To: sandeen@sandeen.net Return-path: Sender: linux-raid-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org Hi Eric, =A0=A0=A0 This is PowerPC architecture from AMCC(I work for AMCC). I am= using 2.6.25 Kernel. According your suggestion I tested with out RAID = I did not see any EXT-3 errors. I use "sum" command to check the data i= ntegrity of the files.=20 I ported ADMA driver to do HW accelerated XOR calculations . Also pleas= e note that RAID-5 works with 4K Page size. Thanks, Marri ----- Original Message ---- =46rom: "sandeen@sandeen.net" To: tirumalareddy marri Cc: linux-raid@vger.kernel.org; linux-ext4@vger.kernel.org Sent: Sunday, July 27, 2008 6:52:05 PM Subject: Re: 64k Page size + ext3 errors > I am using HW accelerated XOR engine for RAID-5 . I am seeing EXT3-fs > errors when I use 64K page size. When I use 4K page size I don't see = any > issue. As many of you know, we=A0will get better performance when we = store > bigger files like videos. Do you think it is specific to the filesystem on raid-5?=A0 Have you te= sted w/o md?=A0 I'd be a little surprised if the problem is at the raid laye= r (so cc'ing the ext3/4 list), but maybe you tested that already. Which arch is it, and which kernel?=A0 How big is the filesystem?=A0 Wi= th full geometry information it might be easier for someone to reproduce & debu= g. Thanks, -Eric > When I copy 128MB size files using 64k page size no issues seen. When= I > tried to copy 1.8 GB file with 64KB page size support I am seeing the > following errors. Any clue what could be wrong. > =A0 > Errors 1: > EXT3-fs error (device md0): ext3_new_block: Allocating block in syste= m > zone - blocks from 65533, length 1 > EXT3-fs error (device md0): ext3_new_block: Allocating block in syste= m > zone - blocks from 65534, length 1 > =A0 > =A0 > Errors2: > EXT3-fs error (device md0): ext3_readdir: bad entry in directory #2: > rec_len % 4 !=3D 0 - offset=3D0, inode=3D3040 > > =A0 > Thanks in Advance, > Marri -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html