Re: [PATCH v2 1/1] IB/sa: Put netlink request into the request list before sending

[Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

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On 11/13/2015 08:57 AM, Wan, Kaike wrote:
>> From: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org [mailto:linux-rdma-
>> owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org] On Behalf Of kaike.wan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org
>> Sent: Friday, October 30, 2015 8:24 AM
>> To: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
>> Cc: Wan, Kaike
>> Subject: [PATCH v2 1/1] IB/sa: Put netlink request into the request list before
>> sending
>>
>> From: Kaike Wan <kaike.wan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>>
>> It was found by Saurabh Sengar that the netlink code tried to allocate
>> memory with GFP_KERNEL while holding a spinlock. While it is possible to fix
>> the issue by replacing GFP_KERNEL with GFP_ATOMIC, it is better to get rid
>> of the spinlock while sending the packet. However, in order to protect
>> against a race condition that a quick response may be received before the
>> request is put on the request list, we need to put the request on the list first.
>>
>> Signed-off-by: Kaike Wan <kaike.wan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>> ---
> 
> Reported-by: Saurabh Sengar <saurabh.truth-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> 

This was pulled in for 4.4-rc.  Thanks.


-- 
Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
              GPG KeyID: 0E572FDD



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