From: Christopher Covington <cov@codeaurora.org>
To: Richard Yao <ryao@gentoo.org>
Cc: kernel@gentoo.org, v9fs-developer@lists.sourceforge.net,
qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org
Subject: Re: QEMU dies on any attempt to load a Linux kernel module when using a 9P rootfs
Date: Tue, 26 Nov 2013 10:16:54 -0500 [thread overview]
Message-ID: <5294BB66.3060608@codeaurora.org> (raw)
In-Reply-To: <5293C622.4070304@gentoo.org>
Hi Richard,
On 11/25/2013 04:50 PM, Richard Yao wrote:
> I figured out the problem. There is zerocopy IO is being done via DMA to
> a buffer allocated with valloc(). Right now, I am running a hack-fix
> locally so I can get some other stuff done first. I will propose a
> proper fix to the list in a few days.
I've also encountered this issue on a non-QEMU simulator and have been
carrying a disable-zero-copy hack for a few months. Let me know if there's
anything I can help with.
Christopher
--
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by the Linux Foundation.
WARNING: multiple messages have this Message-ID (diff)
From: Christopher Covington <cov@codeaurora.org>
To: Richard Yao <ryao@gentoo.org>
Cc: kernel@gentoo.org, v9fs-developer@lists.sourceforge.net,
qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org
Subject: Re: [Qemu-devel] QEMU dies on any attempt to load a Linux kernel module when using a 9P rootfs
Date: Tue, 26 Nov 2013 10:16:54 -0500 [thread overview]
Message-ID: <5294BB66.3060608@codeaurora.org> (raw)
In-Reply-To: <5293C622.4070304@gentoo.org>
Hi Richard,
On 11/25/2013 04:50 PM, Richard Yao wrote:
> I figured out the problem. There is zerocopy IO is being done via DMA to
> a buffer allocated with valloc(). Right now, I am running a hack-fix
> locally so I can get some other stuff done first. I will propose a
> proper fix to the list in a few days.
I've also encountered this issue on a non-QEMU simulator and have been
carrying a disable-zero-copy hack for a few months. Let me know if there's
anything I can help with.
Christopher
--
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by the Linux Foundation.
next prev parent reply other threads:[~2013-11-26 15:16 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-25 15:49 [Qemu-devel] QEMU dies on any attempt to load a Linux kernel module when using a 9P rootfs Richard Yao
2013-11-25 21:50 ` Richard Yao
2013-11-25 21:50 ` [Qemu-devel] " Richard Yao
2013-11-26 15:16 ` Christopher Covington [this message]
2013-11-26 15:16 ` Christopher Covington
2013-11-26 15:38 ` Richard Yao
2013-11-26 15:38 ` [Qemu-devel] " Richard Yao
2013-11-26 15:47 ` Richard Yao
2013-11-26 15:47 ` [Qemu-devel] " Richard Yao
2014-08-21 19:50 ` Christopher Covington
2014-08-21 19:50 ` Christopher Covington
2014-08-22 3:00 ` Richard Yao
2014-08-22 3:00 ` Richard Yao
2014-08-22 6:27 ` [Qemu-devel] [V9fs-developer] " Dominique Martinet
2014-08-22 12:37 ` [V9fs-developer] [Qemu-devel] " Christopher Covington
2014-08-22 12:37 ` [Qemu-devel] [V9fs-developer] " Christopher Covington
2014-08-22 12:49 ` Dominique Martinet
2014-08-22 17:54 ` [V9fs-developer] [Qemu-devel] " Christopher Covington
2014-08-22 17:54 ` [Qemu-devel] [V9fs-developer] " Christopher Covington
-- strict thread matches above, loose matches on Subject: below --
2013-11-25 15:49 Richard Yao
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5294BB66.3060608@codeaurora.org \
--to=cov@codeaurora.org \
--cc=kernel@gentoo.org \
--cc=qemu-devel@nongnu.org \
--cc=ryao@gentoo.org \
--cc=v9fs-developer@lists.sourceforge.net \
--cc=virtualization@lists.linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.