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ARC_ALLOW(-1.00)[microsoft.com:s=arcselector9901:i=1]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[citrix.com:s=securemail,citrix.onmicrosoft.com:s=selector2-citrix-onmicrosoft-com]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; FORGED_SENDER_VERP_SRS(0.00)[]; DWL_DNSWL_LOW(-1.00)[citrix.com:dkim]; TO_MATCH_ENVRCPT_SOME(0.00)[]; MLMMJ_DEST(0.00)[freebsd-xen]; MID_RHS_NOT_FQDN(0.50)[] X-ThisMailContainsUnwantedMimeParts: N On Sun, Apr 03, 2022 at 09:54:24AM +0300, Ze Dupsys wrote: > On 2022.03.27. 12:13, Roger Pau Monné wrote: > >> ==== COUNT: 1 > >> Fatal trap 12: page fault while in kernel mode > >> cpuid = 1; apic id = 02 > >> fault virtual address = 0x148 > >> fault code = supervisor read data, page not present > >> instruction pointer = 0x20:0xffffffff8248cef4 > >> stack pointer = 0x28:0xfffffe009941d9a0 > >> frame pointer = 0x28:0xfffffe009941d9a0 > >> code segment = base 0x0, limit 0xfffff, type 0x1b > >> = DPL 0, pres 1, long 1, def32 0, gran 1 > >> processor eflags = interrupt enabled, resume, IOPL = 0 > >> current process = 0 (xbbd1 taskq) > >> trap number = 12 > >> panic: page fault > >> cpuid = 1 > >> time = 1646129773 > >> KDB: stack backtrace: > >> #0 0xffffffff80c57525 at kdb_backtrace+0x65 > >> #1 0xffffffff80c09f01 at vpanic+0x181 > >> #2 0xffffffff80c09d73 at panic+0x43 > >> #3 0xffffffff8108b1a7 at trap+0xbc7 > >> #4 0xffffffff8108b1ff at trap+0xc1f > >> #5 0xffffffff8108a85d at trap+0x27d > >> #6 0xffffffff81061b18 at calltrap+0x8 > >> #7 0xffffffff825cb76e at zil_open+0xe > >> #8 0xffffffff82456d02 at zvol_ensure_zilog+0xb2 > >> #9 0xffffffff82456818 at zvol_geom_bio_strategy+0x88 > >> #10 0xffffffff80a7f214 at xbd_instance_create+0xa394 > >> #11 0xffffffff80a7b1ea at xbd_instance_create+0x636a > >> #12 0xffffffff80c6b1c1 at taskqueue_run+0x2a1 > >> #13 0xffffffff80c6c4dc at taskqueue_thread_loop+0xac > >> #14 0xffffffff80bc7e3e at fork_exit+0x7e > >> #15 0xffffffff81062b9e at fork_trampoline+0xe > > > > Hm, those last ones are in ZFS code, can you try to get the line > > numbers for those? > > The thing with these ZFS cases is that, luckily i had saved copy of 13.0-p7 > partition, it was official build, but the trace for me seems un unsable for > unknown reasons. It feels that kernel.debug file is the does not match > kernel, but i did manage to install 13-p7 in VirtualBox as well and md5 sum > for that one is the same as in my backup, so i don't know what to think, > because i expected that it would point to blkfront.c and not random lines in > blkback.c. > > cat /tmp/panic.log| sed -Ee 's/^#[0-9]* //' -e 's/ .*//' | xargs addr2line > -e /mnt/gpt_root_13_p7/usr/lib/debug/boot/kernel/kernel.debug > /usr/src/sys/kern/subr_kdb.c:443 > /usr/src/sys/kern/kern_shutdown.c:0 > /usr/src/sys/kern/kern_shutdown.c:843 > /usr/src/sys/amd64/amd64/trap.c:915 > /usr/src/sys/amd64/amd64/trap.c:0 > /usr/src/sys/amd64/amd64/trap.c:0 > /usr/src/sys/amd64/amd64/exception.S:292 > ??:0 > ??:0 > ??:0 > /usr/src/sys/dev/xen/blkback/blkback.c:2183 > /usr/src/sys/dev/xen/blkback/blkback.c:1772 > /usr/src/sys/kern/subr_taskqueue.c:478 > /usr/src/sys/kern/subr_taskqueue.c:799 > /usr/src/sys/kern/kern_fork.c:1075 > /usr/src/sys/amd64/amd64/exception.S:1093 > > From official update servers kern.debug for 13.0-p7 can be downloaded: > fetch http://update2.freebsd.org/13.0-RELEASE/amd64/f/f96dbe024c25febf8a798b5b3d6ca717c2e18f79cc6060cb714c3b3681404608.gz Let's see if you can get another trace of this panic, because I don't seem to be able to make sense out of this. I've tried looking at the RELEASE-13.0 sources (there's no blkback related changed in p7 or the ones before), but the file:line doesn't seem to make much sense. I would assume the call is from the: (*dev_data->csw->d_strategy)(bios[bio_idx]); Call in xbb_dispatch_dev(), but that's not exactly where gdb (or addr2line) points me to. Thanks, Roger.