From owner-freebsd-hackers@freebsd.org Wed Apr 19 17:35:40 2017 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id AB1FDD464CA for ; Wed, 19 Apr 2017 17:35:40 +0000 (UTC) (envelope-from markmi@dsl-only.net) Received: from asp.reflexion.net (outbound-mail-211-185.reflexion.net [208.70.211.185]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 55D0C1945 for ; Wed, 19 Apr 2017 17:35:39 +0000 (UTC) (envelope-from markmi@dsl-only.net) Received: (qmail 12666 invoked from network); 19 Apr 2017 17:30:02 -0000 Received: from unknown (HELO rtc-sm-01.app.dca.reflexion.local) (10.81.150.1) by 0 (rfx-qmail) with SMTP; 19 Apr 2017 17:30:02 -0000 Received: by rtc-sm-01.app.dca.reflexion.local (Reflexion email security v8.40.0) with SMTP; Wed, 19 Apr 2017 13:28:58 -0400 (EDT) Received: (qmail 21793 invoked from network); 19 Apr 2017 17:28:58 -0000 Received: from unknown (HELO iron2.pdx.net) (69.64.224.71) by 0 (rfx-qmail) with (AES256-SHA encrypted) SMTP; 19 Apr 2017 17:28:58 -0000 Received: from [192.168.1.106] (c-76-115-7-162.hsd1.or.comcast.net [76.115.7.162]) by iron2.pdx.net (Postfix) with ESMTPSA id 65AAEEC7901; Wed, 19 Apr 2017 10:28:57 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: Re: The arm64 fork-then-swap-out-then-swap-in failures: a program source for exploring them From: Mark Millard In-Reply-To: Date: Wed, 19 Apr 2017 10:28:56 -0700 Cc: freebsd-hackers@freebsd.org, freebsd-arm Content-Transfer-Encoding: 7bit Message-Id: <7D72C3EF-8F77-4701-93C9-1488072215FC@dsl-only.net> References: <4DEA2D76-9F27-426D-A8D2-F07B16575FB9@dsl-only.net> <163B37B0-55D6-498E-8F52-9A95C036CDFA@dsl-only.net> <08E7A5B0-8707-4479-9D7A-272C427FF643@dsl-only.net> <20170409122715.GF1788@kib.kiev.ua> <9D152170-5F19-47A2-A06A-66F83CA88A09@dsl-only.net> <9DCAF95B-39A5-4346-88FC-6AFDEE8CF9BB@dsl-only.net> <8FFE95AA-DB40-4D1E-A103-4BA9FCC6EDEE@dsl-only.net> <89D6D677-3BE2-45E2-A902-CC6A0305F3F9@dsl-only.net> <585B43F7-D4C8-431A-BFFE-68B48C3214AE@dsl-only.net> To: Jia-Shiun Li X-Mailer: Apple Mail (2.3273) X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 Apr 2017 17:35:40 -0000 On 2017-Apr-18, at 11:16 AM, Jia-Shiun Li wrote: > just noticed that rpi3 wiki page still has outdated issue info regarding > this (the jemalloc error). Anyone to help update it? > > https://wiki.freebsd.org/arm64/rpi3 stable/11 is still in process for the fork handling fixes. One of the 2 fixes to fork behavior has just been MFC'd: -r313772 from head is now -r317147 in stable/11 . So interrupts will no longer trash the sp_el0 register. There is still -r316679 from head to go so that Copy-On-Write would work for fork. (The defect may be more general than just being for fork.) > -Jia-Shiun > > On Mon, Apr 10, 2017 at 5:51 PM, Mark Millard wrote: > >> buildworld buildkernel completed non-stop for the first time >> on a BPI-M3 board. >> >> Looks good for a check-in to svn to me (head and stable/11). >> >> This combined with 2017-Feb-15's -r313772's fix to the fork >> trampline code's updating of sp_el0 makes arm64 far more stable >> for my purposes. >> >> -r313772 was never MFC'd to stable/11. In my view it should be. === Mark Millard markmi at dsl-only.net