linux-kernel - Re: FSX on NFS blew up.

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Message-Id: <1159922084.9569.24.camel@dyn9047017100.beaverton.ibm.com>
Date:	Tue, 03 Oct 2006 17:34:44 -0700
From:	Badari Pulavarty <pbadari@...ibm.com>
To:	Dave Jones <davej@...hat.com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Trond Myklebust <trond.myklebust@....uio.no>
Subject: Re: FSX on NFS blew up.

On Tue, 2006-10-03 at 12:49 -0400, Dave Jones wrote:
> Took ~8hrs to hit this on an NFSv3 mount. (2.6.18+Jan Kara's jbd patch)
> 
> http://www.codemonkey.org.uk/junk/fsx-nfs.txt
> 
> 	Dave
> 

I was seeing *similar* problem on NFS mounted filesystem (while running
fsx), but later realized that filesystem is full - when it happend.

Could be fsx error handling problem ? Can you check yours ?

Thanks,
Badari

#df 
...
/dev/sdc              17504036  17504036         0 100% /mnt1
9.47.xx.xx:/mnt1      17504256  17504256         0 100% /mnt3


I get fsx sigsegvs:

fsx-linux[4514] general protection rip:2ae1d90df690 rsp:7fffd1b57b08 error:0
fsx-linux[4513] general protection rip:2b6ee6048690 rsp:7fffc4becba8 error:0
fsx-linux[4515] general protection rip:2ac5964f0690 rsp:7fff147446f8 error:0
fsx-linux[5586] general protection rip:2b001c974690 rsp:7fff8e2c0278 error:0
fsx-linux[5587] general protection rip:2af03e546690 rsp:7fff6c6ee6a8 error:0
fsx-linux[5588] general protection rip:2ad9ca19c690 rsp:7fffe0a99ec8 error:0
fsx-linux[5585] general protection rip:2b4da569c690 rsp:7fff0559a588 error:0
fsx-linux[5921] general protection rip:2ac4d7346690 rsp:7fffd38f0b38 error:0
fsx-linux[5923] general protection rip:2b942d139690 rsp:7fff7dafd2b8 error:0
fsx-linux[5924] general protection rip:2b14e07cf690 rsp:7fffca465738 error:0
fsx-linux[5922] general protection rip:2af16b457690 rsp:7fff3f7de498 error:0
fsx-linux[5932] general protection rip:2b4b2b6ba690 rsp:7fff7f57c5b8 error:0
fsx-linux[5933] general protection rip:2b1d69ffd690 rsp:7fff40c37c68 error:0
fsx-linux[5934] general protection rip:2b06721f7690 rsp:7fff38a3da78 error:0
fsx-linux[5935] general protection rip:2ba2b5be8690 rsp:7ffff504e088 error:0

truncating to largest ever: 0x13e76
truncating to largest ever: 0x13e76
truncating to largest ever: 0x13e76
truncating to largest ever: 0x13e76
short read: 0xa8c2 bytes instead of 0xf0c4
LOG DUMP (3 total operations):
1(1 mod 256): TRUNCATE UP       from 0x0 to 0x13e76
2(2 mod 256): WRITE     0x17098 thru 0x26857    (0xf7c0 bytes) HOLE
3(3 mod 256): READ      0xc73e thru 0x1b801     (0xf0c4 bytes)
Correct content saved for comparison
(maybe hexdump "/mnt3/foo1" vs "/mnt3/foo1.fsxgood")
short read: 0xa8c2 bytes instead of 0xf0c4
LOG DUMP (3 total operations):
1(1 mod 256): TRUNCATE UP       from 0x0 to 0x13e76
2(2 mod 256): WRITE     0x17098 thru 0x26857    (0xf7c0 bytes) HOLE
3(3 mod 256): READ      0xc73e thru 0x1b801     (0xf0c4 bytes)
short read: 0xa8c2 bytes instead of 0xf0c4
LOG DUMP (3 total operations):
1(1 mod 256): TRUNCATE UP       from 0x0 to 0x13e76
2(2 mod 256): WRITE     0x17098 thru 0x26857    (0xf7c0 bytes) HOLE
3(3 mod 256): READ      0xc73e thru 0x1b801     (0xf0c4 bytes)
Correct content saved for comparison
(maybe hexdump "/mnt3//foo2" vs "/mnt3//foo2.fsxgood")
Correct content saved for comparison
(maybe hexdump "/mnt3//foo3" vs "/mnt3//foo3.fsxgood")
short read: 0xa8c2 bytes instead of 0xf0c4
LOG DUMP (3 total operations):
1(1 mod 256): TRUNCATE UP       from 0x0 to 0x13e76
2(2 mod 256): WRITE     0x17098 thru 0x26857    (0xf7c0 bytes) HOLE
3(3 mod 256): READ      0xc73e thru 0x1b801     (0xf0c4 bytes)
Correct content saved for comparison
(maybe hexdump "/mnt3//foo4" vs "/mnt3//foo4.fsxgood")



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