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Subject: Re: write() system call(via rdma_get_cm_event) is not honoring a
 signal with flag SA_RESTART.
To: KrishnamRaju ErapaRaju <Krishna2@chelsio.com>,
 "freebsd-infiniband@freebsd.org" <freebsd-infiniband@freebsd.org>
References: <4EAB2619577FCA4EBCE11F17B7373447C4313548@nice.asicdesigners.com>
 <3500e324-7d7c-ed94-5913-911fd9877bef@selasky.org>
 <4EAB2619577FCA4EBCE11F17B7373447C431372B@nice.asicdesigners.com>
From: Hans Petter Selasky <hps@selasky.org>
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Date: Thu, 19 May 2016 14:33:40 +0200
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On 05/19/16 14:22, KrishnamRaju ErapaRaju wrote:
> Hans,
>
> I think it's not a regression.
>
> To verify it I have fetched the latest sources(both FreeBSD & OFED 3.2) and started building...
>  Between, may I know when will OFED 3.2 patches be pushed to upstream?
>
> Also, before started building,  I'd quickly replaced -ERESTARTSYS with -512 in ucma_get_event, I still don't see the write() system call getting restarted.
>
> Here are the return codes:
> ucma_get_event, returns -512
> rdma_get_cm_event, returns -1, errorno: 512
>
> So can FreeBSD understand the interrupted system call return value(-512) like Linux?

Hi,

I need to check this a bit closer. Possibly you'll need to loop in the 
application or library when you see errno 512.

--HPS