Return-Path: Received: from mail-wm0-f46.google.com ([74.125.82.46]:35683 "EHLO mail-wm0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933786AbcGKN5h (ORCPT ); Mon, 11 Jul 2016 09:57:37 -0400 Received: by mail-wm0-f46.google.com with SMTP id f65so64366985wmi.0 for ; Mon, 11 Jul 2016 06:57:36 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <97B90495-01FF-4F00-B8F3-67A64DFFDE7C@monkey.org> References: <97B90495-01FF-4F00-B8F3-67A64DFFDE7C@monkey.org> From: Alexey Dobriyan Date: Mon, 11 Jul 2016 16:57:35 +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 4:48 PM, Weston Andros Adamson wrote: > >> On Jul 11, 2016, at 9:28 AM, 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. > Also, you say RHEL7, but which kernel? 3.10.0-229.14.1.el7.x86_64 3.10.0-327.18.2.el7.x86_64