Return-Path: Received: from mail-wm0-f47.google.com ([74.125.82.47]:37183 "EHLO mail-wm0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751917AbcGKOP4 (ORCPT ); Mon, 11 Jul 2016 10:15:56 -0400 Received: by mail-wm0-f47.google.com with SMTP id i5so19055579wmg.0 for ; Mon, 11 Jul 2016 07:15:55 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <34912FDB-DC5B-4287-8659-7D95CE848E48@monkey.org> References: <34912FDB-DC5B-4287-8659-7D95CE848E48@monkey.org> From: Alexey Dobriyan Date: Mon, 11 Jul 2016 17:15:54 +0300 Message-ID: Subject: Re: RHEL7 hang (and probably mainline) while copying big files because of subrequests merging(?) To: Weston Andros Adamson Cc: Trond Myklebust , linux-nfs list , Anna Schumaker Content-Type: text/plain; charset=UTF-8 Sender: linux-nfs-owner@vger.kernel.org List-ID: On Mon, Jul 11, 2016 at 4:52 PM, Weston Andros Adamson wrote: > >> On Jul 11, 2016, at 9:47 AM, Alexey Dobriyan wrote: >> >> On Mon, Jul 11, 2016 at 4:28 PM, Trond Myklebust >> wrote: >>> >>>> On Jul 11, 2016, at 08:59, Alexey Dobriyan wrote: >>>> >>>> We have a customer who was able to reliably reproduce the following hang: >>>> (hang itself is rare but there are many machines, so it is not rare) >>>> >>>> INFO: task ascp:66692 blocked for more than 120 seconds. >>> >>> Why is this being reported here and not to Red Hat? Is the bug reproducible on the upstream kernel? >> >> It is not a report per se, more heads up for other folks like CentOS >> and other rebuilders. >> I checked every NFS commit since 3.10, there seems to be nothing fixing it. >> As for testing mainline, I don't know, maybe we can arrange that. >> >> Alexey >> > > How have you checked every commit since 3.10 and not tested "mainline"? > > I don't get how both can be true. Do you mean you manually inspected each > commit? I'm not sure the fix would be so obvious... I've looked at commits. If the bug was fixed accidentally, then sorry for the noise.