Date: Wed, 09 Jun 2010 00:05:51 +0300 From: Alexander Motin <mav@FreeBSD.org> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-acpi@freebsd.org Subject: Re: Panic on S3 suspend call. Message-ID: <4C0EB0AF.7060400@FreeBSD.org> In-Reply-To: <201006081139.04417.jhb@freebsd.org> References: <4C0E12F6.8050600@FreeBSD.org> <201006081139.04417.jhb@freebsd.org>
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John Baldwin wrote: > On Tuesday 08 June 2010 5:52:54 am Alexander Motin wrote: >> Hi. >> >> Just noted that fresh HEAD i386 system panics on suspend request when >> build with INVARIANTS and WITNESS: >> >> panic: mutex ACPI global lock owned at ../../../kern/kern_event.c:1899 >> cpuid = 1 >> KDB: enter: panic >> [ thread pid 1047 tid 100138 ] >> Stopped at 0x408d29df: movl $0,0x40dded34 >> db> bt >> Tracing pid 1047 tid 100138 td 0x45fcb9c0 >> kdb_enter(40c75fe3,40c75fe3,40c74763,7c91fb1c,1,...) at 0x408d29df >> panic(40c74763,40c26898,40c70d4e,76b,7c91fb40,...) at 0x4089ec96 >> _mtx_assert(40da08a0,0,40c70d4e,76b,7c91fb70,...) at 0x4088e227 >> knlist_mtx_assert_unlocked(40da08a0,4088ed2c,40da08a0,45d377c0,3,...) at >> 0x4086b06e >> knote(45d377dc,0,0,921,0,...) at 0x4086b9ff >> acpi_ReqSleepState(456c3700,3,40c2633d,c76,0,...) at 0x404e8f4b > > I think this should fix it: > > Index: acpi.c > =================================================================== > --- acpi.c (revision 208893) > +++ acpi.c (working copy) > @@ -2346,7 +2346,7 @@ > clone->notify_status = APM_EV_NONE; > if ((clone->flags & ACPI_EVF_DEVD) == 0) { > selwakeuppri(&clone->sel_read, PZERO); > - KNOTE_UNLOCKED(&clone->sel_read.si_note, 0); > + KNOTE_LOCKED(&clone->sel_read.si_note, 0); > } > } With this patch it doesn't panics. A bit surprising, as it was written so almost three years ago. -- Alexander Motin
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