From: Mike Christie <michaelc@cs.wisc.edu>
To: open-iscsi@googlegroups.com
Cc: netdev@vger.kernel.org, linux-scsi@vger.kernel.org,
linux-iscsi-devel@lists.sourceforge.net, "Qi,
Yanling" <Yanling.Qi@lsi.com>,
dougg@torque.net, James Bottomley <James.Bottomley@SteelEye.com>
Subject: Re: SG_IO with >4k buffer size to iscsi sg device causes "Bad page" panic
Date: Tue, 08 May 2007 14:30:16 -0500 [thread overview]
Message-ID: <4640CFC8.9020004@cs.wisc.edu> (raw)
In-Reply-To: <0F08E10B769EAF4EA2C43A573B8CC87FB106C0@NAMAIL3.ad.lsil.com>
Qi, Yanling wrote:
> Hi All,
>
> This panic is related to the interactions between scsi/sg.c, iscsi
> initiator and tcp on the RHEL 2.6.9-42 kernel. But we may also have the
> similar problem with open-iscsi initiator. I will explain why we see the
Yeah, this problem should occur in the upstream open-iscsi iscsi code.
open-iscsi works very similar to linux-scsi where it just sends pages
around with sock->ops-sendpage, and it looks like sg uses
__get_free_pages in RHEL's kernel and upstream it uses alloc_pages so
unless there was a change in those functions or the network layer then
we should have a similar problem.
next prev parent reply other threads:[~2007-05-08 19:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-08 18:08 SG_IO with >4k buffer size to iscsi sg device causes "Bad page" panic Qi, Yanling
2007-05-08 19:30 ` Mike Christie [this message]
2007-05-09 16:13 ` Qi, Yanling
2007-05-09 23:38 ` Herbert Xu
2007-05-10 18:31 ` Qi, Yanling
2007-06-08 6:22 ` Herbert Xu
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