Date: Mon, 24 Apr 2017 16:31:50 -0700 From: Mark Millard <markmi@dsl-only.net> To: Jia-Shiun Li <jiashiun@gmail.com>, freebsd-arm <freebsd-arm@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: The arm64 fork-then-swap-out-then-swap-in failures: a program source for exploring them Message-ID: <7BE9D35E-2F53-49B6-ADE0-60570D01892D@dsl-only.net> In-Reply-To: <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> <CAHNYxxP9uaEFi82oa4%2BU0ndozR7o=7g_yEq2EJ8D6YiBxUH14g@mail.gmail.com> <7D72C3EF-8F77-4701-93C9-1488072215FC@dsl-only.net>
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On 2017-Apr-19, at 10:28 AM, Mark Millard <markmi at dsl-only.net> wrote: > On 2017-Apr-18, at 11:16 AM, Jia-Shiun Li <jiashiun at gmail.com> 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 just noticed that rpi3 wiki page still has outdated issue info regarding 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.) stable/11 -r317354 completes the fixes: Author: kib Date: Mon Apr 24 07:52:44 2017 New Revision: 317354 URL: https://svnweb.freebsd.org/changeset/base/317354 Log: MFC r316679: Do not lose dirty bits for removing PROT_WRITE on arm64. Modified: stable/11/sys/arm64/arm64/pmap.c Directory Properties: stable/11/ (props changed) . . . See: https://lists.freebsd.org/pipermail/svn-src-stable-11/2017-April/003041.html So now the old rpi3 wiki page material is only for masking some of the problems in older contexts for 12 or for older contexts for 11. [I've not been running 11, just 12.] === Mark Millard markmi at dsl-only.net
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