Date: Sun, 6 Nov 2016 19:01:59 +0100 From: Michael Tuexen <tuexen@freebsd.org> To: Konstantin Belousov <kostikbel@gmail.com> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: New warnings from WITNESS Message-ID: <E7BE730E-774D-426E-950F-E936A2456200@freebsd.org> In-Reply-To: <20161106143908.GE54029@kib.kiev.ua> References: <CA9B9B19-5311-4A4E-87ED-8771C1000BEC@freebsd.org> <20161106122802.GA54029@kib.kiev.ua> <A89EC552-F99B-42C1-9990-8937E08A69A6@freebsd.org> <20161106143908.GE54029@kib.kiev.ua>
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> On 6 Nov 2016, at 15:39, Konstantin Belousov <kostikbel@gmail.com> = wrote: >=20 > On Sun, Nov 06, 2016 at 02:17:45PM +0100, Michael Tuexen wrote: >>> On 6 Nov 2016, at 13:28, Konstantin Belousov <kostikbel@gmail.com> = wrote: >>>=20 >>> On Sun, Nov 06, 2016 at 12:50:12PM +0100, Michael Tuexen wrote: >>>> bus_dmamap_create with the following non-sleepable locks held: >>>> exclusive sleep mutex mpt (mpt) r =3D 0 (0xfffffe0000e2f008) locked = @ dev/mpt/mpt.c:2287 >>>> stack backtrace: >>>> #0 0xffffffff80ac0300 at witness_debugger+0x70 >>>> #1 0xffffffff80ac15e7 at witness_warn+0x3d7 >>>> #2 0xffffffff81055fef at bus_dmamap_create+0x2f >>>> #3 0xffffffff80678a25 at mpt_configure_ioc+0x3a5 >>>> #4 0xffffffff80677476 at mpt_attach+0x226 >>>> #5 0xffffffff80683299 at mpt_pci_attach+0x9c9 >>>> #6 0xffffffff80a9478d at device_attach+0x41d >>>> #7 0xffffffff80a9595a at bus_generic_attach+0x4a >>>> #8 0xffffffff806ebe75 at pci_attach+0xd5 >>>> #9 0xffffffff80a9478d at device_attach+0x41d >>>> #10 0xffffffff80a9595a at bus_generic_attach+0x4a >>>> #11 0xffffffff803c11a2 at acpi_pcib_acpi_attach+0x402 >>>> #12 0xffffffff80a9478d at device_attach+0x41d >>>> #13 0xffffffff80a9595a at bus_generic_attach+0x4a >>>> #14 0xffffffff803b4c8f at acpi_attach+0xdbf >>>> #15 0xffffffff80a9478d at device_attach+0x41d >>>> #16 0xffffffff80a9595a at bus_generic_attach+0x4a >>>> #17 0xffffffff80ee03e3 at nexus_acpi_attach+0x73 >>>>=20 >>>> ... and so on. Not sure which revision introduced it... >>> r308268 >>>=20 >>> I believe that this is an mpt(4) driver issue, which calls >>> bus_dmamap_create(9) with the mpt mutex held. >> OK. Whom to contact? Or are you willing to look into it? >> I haven't worked in that area... >=20 > I am really not sure. Looking at the svn history is not very = encouraging. Hmm. Time to change my setup, I guess... >=20 > Might be try freebsd-scsi@ as well. I dropped them an e-mail... Best regards Michael
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