From nobody@FreeBSD.org Tue Apr 26 08:24:56 2011 Return-Path: Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 2A14A106566B for ; Tue, 26 Apr 2011 08:24:56 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from red.freebsd.org (red.freebsd.org [IPv6:2001:4f8:fff6::22]) by mx1.freebsd.org (Postfix) with ESMTP id 19B978FC13 for ; Tue, 26 Apr 2011 08:24:56 +0000 (UTC) Received: from red.freebsd.org (localhost [127.0.0.1]) by red.freebsd.org (8.14.4/8.14.4) with ESMTP id p3Q8OtWX008308 for ; Tue, 26 Apr 2011 08:24:55 GMT (envelope-from nobody@red.freebsd.org) Received: (from nobody@localhost) by red.freebsd.org (8.14.4/8.14.4/Submit) id p3Q8OtJt008307; Tue, 26 Apr 2011 08:24:55 GMT (envelope-from nobody) Message-Id: <201104260824.p3Q8OtJt008307@red.freebsd.org> Date: Tue, 26 Apr 2011 08:24:55 GMT From: KOIE Hidetaka To: freebsd-gnats-submit@FreeBSD.org Subject: sysctl vm.idlezero_enable=1 causes hangup. X-Send-Pr-Version: www-3.1 X-GNATS-Notify: >Number: 156658 >Category: kern >Synopsis: [vm] [sysctl] sysctl vm.idlezero_enable=1 causes hangup. >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Apr 26 08:30:05 UTC 2011 >Closed-Date: >Last-Modified: Tue May 03 06:10:47 UTC 2011 >Originator: KOIE Hidetaka >Release: 9.0-CURRENT >Organization: surigiken >Environment: FreeBSD freebsd.suri.co.jp 9.0-CURRENT FreeBSD 9.0-CURRENT #6: Tue Apr 26 16:14:09 JST 2011 koie@freebsd.suri.co.jp:/usr/obj/usr/src/sys/GENERIC amd64 >Description: After sysctl vm.idlezero_enable=1, many processes wait for [*vm page queue free mutex] and don't respond. It seems that the vm_pagezero() thread loops in vm_phys_zero_pages_idle() forever with mtx_lock(&vm_page_queue_free_mtx). >How-To-Repeat: sysctl vm.idlezero_enable=1 find / -type f -print | xargs grep -l hogehogehoge >Fix: >Release-Note: >Audit-Trail: >Unformatted: