From: Paolo Bonzini <pbonzini@redhat.com>
To: Gerhard Wiesinger <lists@wiesinger.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] XP install cores with SCSI LSI 53C895A disks - follow up
Date: Mon, 05 Nov 2012 13:54:49 +0100 [thread overview]
Message-ID: <5097B719.9040504@redhat.com> (raw)
In-Reply-To: <5096415A.2000202@wiesinger.com>
Il 04/11/2012 11:20, Gerhard Wiesinger ha scritto:
> Hello,
>
> Clean XP install cores with SCSI LSI 53C89A disk when copying files.
> Isn't on the same file, so looks like a timing problem. Reproduceable.
> Driver used is sym_hi. Details are below.
Hmm, why is XP resetting the HBA while copying files? Can you get
logging output when compiling with hw/lsi53c895a.c with DEBUG_LSI defined?
> See also:
> https://lists.gnu.org/archive/html/qemu-devel/2012-03/msg00523.html
>
> Looks like problem is from Paolo's commit:
> 2f0772c5b4818d4b2078be9dace0036d1030faee
> qemu-system-x86_64: hw/lsi53c895a.c:351: lsi_soft_reset: Assertion
> `((&s->queue)->tqh_first == ((void *)0))' failed.
>
> So SCSI queue isn't empty (was an assumption and asserted), so
> qdev_reset_all(&s->dev.qdev); might not work or some other timing
> related issues.
Even before that commit, it probably would result in a use-after-free or
similar problem.
Thanks!
Paolo
prev parent reply other threads:[~2012-11-05 12:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-04 10:20 [Qemu-devel] XP install cores with SCSI LSI 53C895A disks - follow up Gerhard Wiesinger
2012-11-05 12:54 ` Paolo Bonzini [this message]
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