Date: Fri, 06 Sep 2013 11:29:11 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Jeremie Le Hen <jlh@FreeBSD.org> Cc: freebsd-hackers@freebsd.org, "freebsd-current@freebsd.org" <freebsd-current@freebsd.org>, freebsd-geom@freebsd.org Subject: Re: [RFC][CFT] GEOM direct dispatch and fine-grained CAM locking Message-ID: <52299257.10704@FreeBSD.org> In-Reply-To: <20130906080627.GH43281@caravan.chchile.org> References: <520D4ADB.50209@FreeBSD.org> <5224511D.4090503@FreeBSD.org> <20130903134251.GB43281@caravan.chchile.org> <CAKYr3zwjQ9K1c5smZXTESa3T5UnchYaipYQCS2OAJOUFyPBGww@mail.gmail.com> <CA%2Bq%2BTcoeHDbkCOXvBjbbzOKCbb7RLYqG0jn9bHNn_CZgLGarLg@mail.gmail.com> <5226DAB0.1060303@FreeBSD.org> <CA%2Bq%2BTcoKg-FuuKt_L9W8rGc_ZEv9XOteq=x6N%2BVT9_mUhRJDHQ@mail.gmail.com> <5228F9D4.3060008@FreeBSD.org> <CA%2Bq%2BTcrW%2B73JeUw9nxTcCdXTu578n25n_E_2Z9FDB1RGZ0_5cg@mail.gmail.com> <20130906080627.GH43281@caravan.chchile.org>
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On 06.09.2013 11:06, Jeremie Le Hen wrote: > On Fri, Sep 06, 2013 at 12:46:27AM +0200, Olivier Cochard-Labbé wrote: >> On Thu, Sep 5, 2013 at 11:38 PM, Alexander Motin <mav@freebsd.org> wrote: >>> I've found and fixed possible double request completion, that could cause >>> such symptoms if happened. Updated patch located as usual: >>> http://people.freebsd.org/~mav/camlock_patches/camlock_20130905.patch >>> > With this new one I cannot boot any more (I also updated the source > tree). This is a hand transcripted version: > > Trying to mount root from zfs:zroot/root []... > panic: Batch flag already set > cpuid = 1 > KDB: stack backtrace: > db_trace_self_wrapper() > kdb_backtrace() > vpanic() > kassert_panic() > xpt_batch_start() > ata_interrupt() > softclock_call_cc() > softclock() > ithread_loop() > fork_exit() > fork_trampoline() Thank you for the report. I see my fault. It is probably specific to ata(4) driver only. I've workarounded that in new patch version, but probably that area needs some rethinking. http://people.freebsd.org/~mav/camlock_patches/camlock_20130906.patch -- Alexander Motin
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