Date: Tue, 9 Mar 2021 13:46:09 -0800 From: David Wolfskill <david@catwhisker.org> To: Warner Losh <imp@bsdimp.com>, FreeBSD Current <current@freebsd.org> Subject: Re: "panic: malloc(M_WAITOK) with sleeping prohibited" at main-n245363-b3dac3913dc9 Message-ID: <YEfsoSP9rNALWFdR@albert.catwhisker.org> In-Reply-To: <YEfnRA1WvWtsM8ks@albert.catwhisker.org> References: <YEdlblQdBcjZkcf%2B@albert.catwhisker.org> <CANCZdfqnMktE4uAU%2BOP8ZKyXzupTqPqr21fP1PDk1U%2BJDswhuw@mail.gmail.com> <YEfnRA1WvWtsM8ks@albert.catwhisker.org>
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--RDao9UEPN9P/3u9T Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Mar 09, 2021 at 01:23:16PM -0800, David Wolfskill wrote: > On Tue, Mar 09, 2021 at 01:53:37PM -0700, Warner Losh wrote: > > ... > > The following reviews should fix this. It introduces a no-wait variant = for > > disk_alloc(), provides a way to free allocated, but not created, disks = and > > changes CAM to use the new routines and take some care for not leaking = when > > an allocation fails. > >=20 > > https://reviews.freebsd.org/D29161 > > https://reviews.freebsd.org/D29162 > > https://reviews.freebsd.org/D29163 > >=20 > > Maybe you can try it? I got similar tracebacks when I booted w/o these > > changes, but not a peep with them... > > ... >=20 > Thanks! >=20 > They applied cleanly; building now -- both on the build machine (which > failed earlier) and on the newer laptop (which did not fail earlier, as > it's good to find out if a change has broken somehing that had been > working). > .... The laptop still works: FreeBSD g1-48.catwhisker.org 14.0-CURRENT FreeBSD 14.0-CURRENT #169 main-n2= 45338-221622ec0c8e-dirty: Mon Mar 8 03:50:50 PST 2021 root@g1-48.catwh= isker.org:/common/S4/obj/usr/src/amd64.amd64/sys/CANARY amd64 1400005 1400= 005 FreeBSD g1-48.catwhisker.org 14.0-CURRENT FreeBSD 14.0-CURRENT #170 main-n2= 45363-b3dac3913dc9-dirty: Tue Mar 9 05:06:34 PST 2021 root@g1-48.catwh= isker.org:/common/S4/obj/usr/src/amd64.amd64/sys/CANARY amd64 1400005 1400= 005 FreeBSD g1-48.catwhisker.org 14.0-CURRENT FreeBSD 14.0-CURRENT #170 main-n2= 45363-b3dac3913dc9-dirty: Tue Mar 9 05:06:34 PST 2021 root@g1-48.catwh= isker.org:/common/S4/obj/usr/src/amd64.amd64/sys/CANARY amd64 1400005 1400= 005 The build nmachine (still?) panics: =2E.. pass3: 600.000MB/s transfers (SATA 3.x, UDMA5, PIO 8192bytes) pass3: Command Queueing enabled pass4 at ahcich4 bus 0 scbus4 target 0 lun 0 pass4: <M4-CT512M4SSD2 0309> ACS-2 ATA SATA 3.x device pass4: Serial Number 000000001242091982C2 pass4: 600.000MB/s transfers (SATA 3.x, ugen2.2: <vendor 0x8087 product 0x8= 000> at usbus2 UDMA5, PIO 8192bytes) pass4: Command Queueing enabled uhub4 on uhub1 pass5 at ahciem0 bus 0 scbus5 target 0 lun 0 uhub4: <vendor 0x8087 product 0x8000, class 9/0, rev 2.00/0.05, addr 2> on = usbus2 Root mount waiting for:pass5: <AHCI SGPIO Enclosure 2.00 0001> usbus0 usbus= 1 usbus2ugen0.2: <Generic USB2.0-CRW> at usbus0 CAM SEMB S-E-S 2.00 device uma_zalloc_debug: zone "malloc-1024"umass0 on uhub2 with the following non-sleepable locks held: umass0: <Bulk-In, Bulk-Out, Interface> on usbus0 exclusive sleep mutex CAM device lockumass0: SCSI over Bulk-Only; quirks = =3D 0x4000 (CAM device lock) r =3D 0 (0xfffff800122c9cd0) locked @ /usr/src/sys/cam/c= am_xpt.c:2333 umass0:6:0: Attached to scbus6 stack backtrace: (probe0:umass-sim0:0:0:0): Down reving Protocol Version from 2 to 0? #0 0xffffffff80c7cce1 at witnesuhub3: 6 ports with 6 removable, self powered s_debugger+0x71 pass6 at umass-sim0 bus 0 scbus6 target 0 lun 0 #1 0xffffffff80pass6: uhub4: 8 ports with 8 removable, self powered c7ddfd at witness_warn+0x40d #2<Generic- Compact Flash 1.00> Removable Direct Access SCSI device 0xffffffff80f42fe6 at uma_zallpass6: Serial Number 20100818841300000 oc_arg+0x46 #3 0xffffffff80be34pass6: 40.000MB/s transfers panic: malloc(M_WAITOK) with sleeping prohibited cpuid =3D 1 time =3D 22 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00e157a= 2d0 vpanic() at vpanic+0x181/frame 0xfffffe00e157a320 panic() at panic+0x43/frame 0xfffffe00e157a380 malloc_dbg() at malloc_dbg+0xd4/frame 0xfffffe00e157a3a0 malloc() at malloc+0x34/frame 0xfffffe00e157a400 g_post_event_x() at g_post_event_x+0x5a/frame 0xfffffe00e157a450 g_post_event() at g_post_event+0x48/frame 0xfffffe00e157a4b0 disk_create() at disk_create+0x16f/frame 0xfffffe00e157a600 daregister() at daregister+0x70a/frame 0xfffffe00e157a880 cam_periph_alloc() at cam_periph_alloc+0x57b/frame 0xfffffe00e157a950 daasync() at daasync+0x2c2/frame 0xfffffe00e157a9c0 xpt_async_process_dev() at xpt_async_process_dev+0x152/frame 0xfffffe00e157= aa10 xpt_async_process() at xpt_async_process+0x334/frame 0xfffffe00e157ab20 xpt_done_process() at xpt_done_process+0x3a3/frame 0xfffffe00e157ab60 xpt_done_td() at xpt_done_td+0xf5/frame 0xfffffe00e157abb0 fork_exit() at fork_exit+0x80/frame 0xfffffe00e157abf0 fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00e157abf0 --- trap 0, rip =3D 0, rsp =3D 0, rbp =3D 0 --- KDB: enter: panic [ thread pid 17 tid 100095 ] Stopped at kdb_enter+0x37: movq $0,0x128b8ce(%rip) db>=20 I'm willing to "poke at it" a bit, given a hint or two... Peace, david --=20 David H. Wolfskill david@catwhisker.org It is supremely disingenuous to claim a lack of jurisdiction, then =20 proceed to participate in a decision on the same matter. See https://www.catwhisker.org/~david/publickey.gpg for my public key. --RDao9UEPN9P/3u9T Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQGTBAEBCgB9FiEE4owz2QxMJyaxAefyQLJg+bY2PckFAmBH7KFfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEUy OEMzM0Q5MEM0QzI3MjZCMTAxRTdGMjQwQjI2MEY5QjYzNjNEQzkACgkQQLJg+bY2 PcmzkQf+M8TfbJwzZjfmp15cTlAPxNf6V6o7mQWA7espcRALoklaM47zEAveoXgX ExlDeeIgwhGPem/rbZfLayPH+KseOTPi+In7R9XYbadR4SdEgEaSZjLc77YnvxMh tB9cLTCJCYMs0fAV/iMxLYFpVM1m9k+P5ysHq7I3M3ZfK/PHZpQqcgC7ftwmueBg p63RzdLBfZpuW7MLBeC5XFI+kA+JjBFqVyHIo7jWMoUIWXIXj1FTPSTimEEiuruw dZqHf4AWbD2AZCBkRc8VqV4FwnmtJO4lRQ85LTj69JkyyNDHDAGZR3hvx9YMYzPu xdlN6ZhOiFmFDhBMcGtSzK0AF8m5JQ== =u8sR -----END PGP SIGNATURE----- --RDao9UEPN9P/3u9T--
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