Date: Wed, 21 Feb 2018 17:06:06 +0000 From: Andrew Turner <andrew@fubar.geek.nz> To: cem@freebsd.org Cc: src-committers <src-committers@freebsd.org>, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r329612 - in head/sys: kern sys Message-ID: <DC3B30D2-8D05-411F-8AA7-183EC6864FB4@fubar.geek.nz> In-Reply-To: <CAG6CVpXWpVUSaXwKni8hQCVAPCsPtpFfvjfYHHXbWgYKji1hig@mail.gmail.com> References: <201802200006.w1K067ZL032311@repo.freebsd.org> <F9823809-BB07-4C75-BF77-B6F3833B0687@fubar.geek.nz> <CAG6CVpXWpVUSaXwKni8hQCVAPCsPtpFfvjfYHHXbWgYKji1hig@mail.gmail.com>
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Yes, I=E2=80=99m still getting it on r329721. Andrew > On 21 Feb 2018, at 17:02, Conrad Meyer <cem@freebsd.org> wrote: >=20 > Do you have r329672 yet? >=20 > Best, > Conrad >=20 > On Wed, Feb 21, 2018 at 7:11 AM, Andrew Turner <andrew@fubar.geek.nz> = wrote: >>=20 >>> On 20 Feb 2018, at 00:06, Jeff Roberson <jeff@FreeBSD.org> wrote: >>>=20 >>> Author: jeff >>> Date: Tue Feb 20 00:06:07 2018 >>> New Revision: 329612 >>> URL: https://svnweb.freebsd.org/changeset/base/329612 >>>=20 >>> Log: >>> Further parallelize the buffer cache. >>>=20 >>> Provide multiple clean queues partitioned into 'domains'. Each = domain manages >>> its own bufspace and has its own bufspace daemon. Each domain has a = set of >>> subqueues indexed by the current cpuid to reduce lock contention on = the cleanq. >>>=20 >>> Refine the sleep/wakeup around the bufspace daemon to use atomics as = much as >>> possible. >>>=20 >>> Add a B_REUSE flag that is used to requeue bufs during the scan to = approximate >>> LRU rather than locking the queue on every use of a frequently = accessed buf. >>>=20 >>> Implement bufspace_reserve with only atomic_fetchadd to avoid loop = restarts. >>>=20 >>> Reviewed by: markj >>> Tested by: pho >>> Sponsored by: Netflix, Dell/EMC Isilon >>> Differential Revision: https://reviews.freebsd.org/D14274 >>=20 >> I=E2=80=99m seeing the following panic on FreeBSD/arm64 after this = change. >>=20 >> Andrew >>=20 >> panic: bq_remove: Remove buffer 0xffff00004082f260 from wrong queue. >> cpuid =3D 4 >> time =3D 1519088201 >> KDB: stack backtrace: >> db_trace_self() at db_trace_self_wrapper+0x28 >> pc =3D 0xffff00000062fee4 lr =3D 0xffff0000000c0450 >> sp =3D 0xffff000040364480 fp =3D 0xffff000040364690 >>=20 >> db_trace_self_wrapper() at vpanic+0x184 >> pc =3D 0xffff0000000c0450 lr =3D 0xffff000000354ce8 >> sp =3D 0xffff0000403646a0 fp =3D 0xffff000040364720 >>=20 >> vpanic() at kassert_panic+0x158 >> pc =3D 0xffff000000354ce8 lr =3D 0xffff000000354b60 >> sp =3D 0xffff000040364730 fp =3D 0xffff0000403647f0 >>=20 >> kassert_panic() at bq_remove+0x178 >> pc =3D 0xffff000000354b60 lr =3D 0xffff0000003f7014 >> sp =3D 0xffff000040364800 fp =3D 0xffff000040364810 >>=20 >> bq_remove() at buf_recycle+0x100 >> pc =3D 0xffff0000003f7014 lr =3D 0xffff0000003fca80 >> sp =3D 0xffff000040364820 fp =3D 0xffff000040364880 >>=20 >> buf_recycle() at bufspace_daemon+0xb4 >> pc =3D 0xffff0000003fca80 lr =3D 0xffff0000003fd31c >> sp =3D 0xffff000040364890 fp =3D 0xffff000040364910 >>=20 >> bufspace_daemon() at fork_exit+0x7c >> pc =3D 0xffff0000003fd31c lr =3D 0xffff000000318388 >> sp =3D 0xffff000040364920 fp =3D 0xffff000040364950 >>=20 >> fork_exit() at fork_trampoline+0x10 >> pc =3D 0xffff000000318388 lr =3D 0xffff000000649ec4 >> sp =3D 0xffff000040364960 fp =3D 0x0000000000000000 >>=20 >> KDB: enter: panic >=20
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