Re: [2.6 patch] i386: always use 4k stacks

Mike Christie
2005-11-15T00:55:47Z

Mike Christie wrote:
> Olivier Galibert wrote:
>
>> On Mon, Nov 14, 2005 at 12:53:31PM +0100, Arjan van de Ven wrote:
>>
>>> The experience with Fedora so far is exceptionally good; in early 2.6
>>> there were some reports with XFS stacked on top of DM, but since then
>>> XFS has gone on a stack diet... also the -mm patches to do non-recursive
>>> IO submission will bury this (mostly theoretical) monster for good.
>>
>>
>>
>> Not theorical for iscsi though. I guess net+block is a little too
>> much.
>>
>
> If you have stack problem with iscsi then you should post it to those
> lists or send me a pointer offlist. There were problems with iscsi and
> XFS but they should be fixed in mainline. The XFS + iscsi problems that
> have been reported have not been stack usage problems though.
>

I think to hit a iscsi stack problem you will have to have the scsi
request_fn get called from __make_request (or one of the functions it
calls like __elv_add_request which looks like it could call
__generic_unplug_device). And then the iscsi queuecomamnd would have to
hit the path that calls iscsi_data_xmit. Have you hit this?