Re: 2.6.18-rc3-git3 - XFS - BUG: unable to handle kernel NULL pointerdereference at virtual address 00000078

From: Tony.Ho
Date: Sun Aug 06 2006 - 00:06:39 EST


I'm sorry about prev mail. I test on a wrong kernel.
The panic is not appear again, but random delete performance looks very bad.

Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
test 4G 50317 99 232444 54 109507 25 52287 98 329821 29 1169 2
------Sequential Create------ --------Random Create--------
-Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP
16 104 1 +++++ +++ 87 1 103 1 +++++ +++ 100 1
test,4G,50317,99,232444,54,109507,25,52287,98,329821,29,1169.4,2,16,104,1,+++++,+++,87,1,103,1,+++++,+++,100,1


Tony.Ho wrote:
I'vs tested this patch, but the XFS panic is also reproducible, error message is same as before.


Nathan Scott wrote:
On Fri, Aug 04, 2006 at 10:22:21AM +0200, Jesper Juhl wrote:
I just hit a BUG that looks XFS related.

The machine is running 2.6.18-rc3-git3

(more info below the BUG messages)


Thanks for reporting, Jesper - is it reproducible? Could you try this
patch for me? We had a couple of other reports of this, but the earlier
reporters have vanished ... could you let me know if this helps?

cheers.

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