linux-kernel - Re: pm/linux-next cause network stop working with qemu-kvm/e1000

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Message-ID: <CAE9FiQUarQVqzB_VSMqUrMvSHryrSN3_4tLTEJqygDFzB7uDUw@mail.gmail.com>
Date:	Sat, 23 Mar 2013 01:38:43 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Bob Moore <robert.moore@...el.com>
Cc:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: pm/linux-next cause network stop working with qemu-kvm/e1000

On Fri, Mar 22, 2013 at 5:27 PM, Yinghai Lu <yinghai@...nel.org> wrote:
> c13085e519e8984fede41fa3d6a5502523b10996 is the first bad commit
> commit c13085e519e8984fede41fa3d6a5502523b10996
> Author: Bob Moore <robert.moore@...el.com>
> Date:   Fri Mar 8 09:19:38 2013 +0000
>
>     ACPICA: Resource Mgr: Prevent infinite loops in resource walks
>
>     Add checks for zero-length resource descriptors in all code that
>     loops through a resource descriptor list. This prevents possible
>     infinite loops because the length is used to increment the traveral
>     pointer and detect the end-of-descriptor.
>
>     Signed-off-by: Bob Moore <robert.moore@...el.com>
>     Signed-off-by: Lv Zheng <lv.zheng@...el.com>
>     Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>
> :040000 040000 84f29d6ee654ffe4c935ce9023208019b2ef09a5
> c8a6613be9a5a130f69e654c5b560a8adb2174db M      drivers
>
>
> long delay after
> calling  ip_auto_config+0x0/0xea4 @ 1
>
> also happen on one 8 sockets nehalem-ex.
>
> If I revert that commit, network works again.

Attached patch fix the problem. Please fold it into offending patch in
pm/linux-next.

Thanks

Yinghai

Download attachment "fix_x.patch" of type "application/octet-stream" (542 bytes)