Date: Sat, 07 Sep 2013 09:32:45 +0300 From: Alexander Motin <mav@FreeBSD.org> To: 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: <522AC88D.4070005@FreeBSD.org> In-Reply-To: <20130906230236.GI43281@caravan.chchile.org> References: <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> <52299257.10704@FreeBSD.org> <20130906230236.GI43281@caravan.chchile.org>
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On 07.09.2013 02:02, Jeremie Le Hen wrote: > On Fri, Sep 06, 2013 at 11:29:11AM +0300, Alexander Motin wrote: >> 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 > > I'm not sure you needed a confirmation, but it boots. Thanks :). > > I didn't quite understand the thread; is direct dispatch enabled for > amd64? ISTR you said only i386 but someone else posted the macro for > amd64. Yes, it is enabled for amd64. I've said x86, meaning both i386 and amd64. -- Alexander Motin
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