From: Mike Christie <michaelc@cs.wisc.edu>
To: Matthew Wilcox <matthew@wil.cx>
Cc: James Smart <James.Smart@Emulex.Com>,
linux-scsi@vger.kernel.org, tore@linpro.no
Subject: Re: [Patch] plug async scan race at 1st node scan
Date: Sat, 01 Mar 2008 05:44:29 -0600 [thread overview]
Message-ID: <47C9419D.1040402@cs.wisc.edu> (raw)
In-Reply-To: <20070820134918.GC30019@parisc-linux.org>
Matthew Wilcox wrote:
> On Mon, Aug 20, 2007 at 09:10:35AM -0400, James Smart wrote:
>> In testing 2.6.23-rc3, there is a small window where the async-per-target
>> scan of the transport can beat the call from the LLDD to scsi_scan_host().
>
> I'd assumed that events wouldn't come in until ->scan_start was called.
> I see lpfc doesn't have one; is it possible to restructure it to have one?
>
> (In any case, good job tracking this down; it was really annoying me.)
>
> Possibly we should be less forgiving, and require drivers to have a
> scan_start, otherwise they can't avoid this race.
>
I am hitting this problem with qla4xxx (added async scanning to
2.6.25-rc). Was the final decision that we have to add a scan_start? I
did not see scan_start be made mandatory and I did not see James's patch
go in.
next prev parent reply other threads:[~2008-03-01 11:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-20 13:10 [Patch] plug async scan race at 1st node scan James Smart
2007-08-20 13:49 ` Matthew Wilcox
2007-08-20 14:02 ` James Smart
2007-08-20 14:32 ` Matthew Wilcox
2008-03-01 11:44 ` Mike Christie [this message]
2008-03-01 14:26 ` Matthew Wilcox
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