Date: Thu, 02 Jun 2016 19:31:12 -0700 From: Matthew Macy <mmacy@nextbsd.org> To: "K. Macy" <kmacy@freebsd.org> Cc: "Michael Butler" <imb@protected-networks.net>, "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Re: repeatable panic on pageout with 945GM Message-ID: <1551419a1db.12929035f45012.326107747932338888@nextbsd.org> In-Reply-To: <CAHM0Q_PR5Aoak6A7f=tsRy0DJFCmLDVfRGpceZ0mXU3P%2BxO8DA@mail.gmail.com> References: <2490f1c7-8153-ece3-49ed-4b3886564fd7@protected-networks.net> <da19738b-6bf1-10a3-4428-43b6095ec35a@protected-networks.net> <205d4423-b834-9a21-785f-fa15d44c78ec@protected-networks.net> <CAHM0Q_PR5Aoak6A7f=tsRy0DJFCmLDVfRGpceZ0mXU3P%2BxO8DA@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Tell me if that makes any difference.
-M
---- On Thu, 02 Jun 2016 16:55:53 -0700 K. Macy <kmacy@freebsd.org> wrote ----
> It looks like it might be trying to remove mappings for a page that doesn't
> have any. It's a bit odd. Likely a bug in cdev_pager_free_page or gem
> release mmap. Compile the kernel and driver with -O0 and look at the page.
> It's too bad I don't support AGP yet with DRM 4.6. Maybe in a week or two.
diff --git a/sys/vm/device_pager.c b/sys/vm/device_pager.c
index 013f0d5..917ece7 100644
--- a/sys/vm/device_pager.c
+++ b/sys/vm/device_pager.c
@@ -211,7 +211,8 @@ cdev_pager_free_page(vm_object_t object, vm_page_t m)
VM_OBJECT_ASSERT_WLOCKED(object);
if (object->type == OBJT_MGTDEVICE) {
KASSERT((m->oflags & VPO_UNMANAGED) == 0, ("unmanaged %p", m));
- pmap_remove_all(m);
+ if (pmap_page_is_mapped(page))
+ pmap_remove_all(m);
vm_page_lock(m);
vm_page_remove(m);
vm_page_unlock(m);
>
> -M
>
> On Thursday, June 2, 2016, Michael Butler <imb@protected-networks.net>
> wrote:
>
> > On 05/23/16 21:10, Michael Butler wrote:
> > > On 05/22/16 09:58, Michael Butler wrote:
> > >> With KDE and compositing enabled, I randomly get the following:
> > >>
> > >> (kgdb) info stack
> > >> #0 doadump (textdump=<value optimized out>) at pcpu.h:221
> > >> #1 0xffffffff8064e98e in kern_reboot (howto=260) at
> > >> /usr/src/sys/kern/kern_shutdown.c:366
> > >> #2 0xffffffff8064eea1 in vpanic (fmt=<value optimized out>, ap=<value
> > >> optimized out>) at /usr/src/sys/kern/kern_shutdown.c:759
> > >> #3 0xffffffff8064ed13 in panic (fmt=0x0) at
> > >> /usr/src/sys/kern/kern_shutdown.c:690
> > >> #4 0xffffffff809d18ed in vm_fault_hold (map=<value optimized out>,
> > >> vaddr=<value optimized out>, fault_type=<value optimized out>,
> > >> fault_flags=<value optimized out>, m_hold=<value optimized out>) at
> > >> /usr/src/sys/vm/vm_fault.c:327
> > >> #5 0xffffffff809cf548 in vm_fault (map=0xfffff80002000000, vaddr=<value
> > >> optimized out>, fault_type=1 '\001', fault_flags=<value optimized out>)
> > >> at /usr/src/sys/vm/vm_fault.c:273
> > >> #6 0xffffffff80a1849f in trap_pfault (frame=<value optimized out>,
> > >> usermode=0) at /usr/src/sys/amd64/amd64/trap.c:741
> > >> #7 0xffffffff80a17b30 in trap (frame=0xfffffe00dbec5830) at
> > >> /usr/src/sys/amd64/amd64/trap.c:442
> > >> #8 0xffffffff809fd5a1 in calltrap () at
> > >> /usr/src/sys/amd64/amd64/exception.S:236
> > >> #9 0xffffffff80a0a3bb in pmap_remove_all (m=<value optimized out>) at
> > >> /usr/src/sys/amd64/amd64/pmap.c:3950
> > >> #10 0xffffffff809c0c57 in cdev_pager_free_page (object=<value optimized
> > >> out>, m=0xfffffe0001e410d0) at /usr/src/sys/vm/device_pager.c:214
> > >> #11 0xffffffff816aff33 in i915_gem_release_mmap (obj=<value optimized
> >
> > [ .. snip .. ]
> >
> > Even with the most recent mesa update - something is upsetting this
> > device :-(
> >
> > (kgdb) bt
> > #0 doadump (textdump=<value optimized out>) at pcpu.h:221
> > #1 0xffffffff805cfe9a in kern_reboot (howto=260) at
> > /usr/src/sys/kern/kern_shutdown.c:366
> > #2 0xffffffff805d03e1 in vpanic (fmt=<value optimized out>, ap=<value
> > optimized out>) at /usr/src/sys/kern/kern_shutdown.c:759
> > #3 0xffffffff805d0253 in panic (fmt=0x0) at
> > /usr/src/sys/kern/kern_shutdown.c:690
> > #4 0xffffffff8096c56e in vm_fault_hold (map=<value optimized out>,
> > vaddr=<value optimized out>, fault_type=<value optimized out>,
> > fault_flags=<value optimized out>, m_hold=<value optimized out>) at
> > /usr/src/sys/vm/vm_fault.c:327
> > #5 0xffffffff80969f78 in vm_fault (map=0xfffff80002000000, vaddr=<value
> > optimized out>, fault_type=1 '\001', fault_flags=<value optimized out>)
> > at /usr/src/sys/vm/vm_fault.c:273
> > #6 0xffffffff809b556f in trap_pfault (frame=<value optimized out>,
> > usermode=0) at /usr/src/sys/amd64/amd64/trap.c:741
> > #7 0xffffffff809b4c00 in trap (frame=0xfffffe00dc0ef310) at
> > /usr/src/sys/amd64/amd64/trap.c:442
> > #8 0xffffffff80999d81 in calltrap () at
> > /usr/src/sys/amd64/amd64/exception.S:236
> > #9 0xffffffff809a6d4e in pmap_remove_all (m=<value optimized out>) at
> > /usr/src/sys/amd64/amd64/pmap.c:3950
> > #10 0xffffffff8095ab7b in cdev_pager_free_page (object=<value optimized
> > out>, m=0xfffffe0001e2c270) at /usr/src/sys/vm/device_pager.c:214
> > #11 0xffffffff816aff33 in i915_gem_release_mmap (obj=<value optimized
> > out>) at
> > /usr/src/sys/modules/drm2/i915kms/../../../dev/drm2/i915/i915_gem.c:1691
> > #12 0xffffffff816b15ba in i915_gem_object_get_fence (obj=<value
> > optimized out>) at
> > /usr/src/sys/modules/drm2/i915kms/../../../dev/drm2/i915/i915_gem.c:105
> > #13 0xffffffff816b7f2e in i915_gem_execbuffer_reserve_object
> > (obj=0xfffff8009858f200, ring=<value optimized out>)
> > at
> >
> > /usr/src/sys/modules/drm2/i915kms/../../../dev/drm2/i915/i915_gem_execbuffer.c:368
> > #14 0xffffffff816b7d8f in i915_gem_execbuffer_reserve () at
> >
> > /usr/src/sys/modules/drm2/i915kms/../../../dev/drm2/i915/i915_gem_execbuffer.c:491
> > #15 0xffffffff816b6bb5 in i915_gem_do_execbuffer () at
> >
> > /usr/src/sys/modules/drm2/i915kms/../../../dev/drm2/i915/i915_gem_execbuffer.c:1036
> > #16 0xffffffff816b7ad1 in i915_gem_execbuffer2 (dev=0xfffff800059e9000,
> > data=0xfffffe00dc0efa20, file=0xfffff80005db4a00)
> > at
> >
> > /usr/src/sys/modules/drm2/i915kms/../../../dev/drm2/i915/i915_gem_execbuffer.c:1273
> > #17 0xffffffff812c7eae in drm_ioctl (kdev=<value optimized out>,
> > cmd=<value optimized out>, data=0xfffffe00dc0efa20 "", flags=<value
> > optimized out>,
> > p=<value optimized out>) at
> > /usr/src/sys/modules/drm2/drm2/../../../dev/drm2/drm_drv.c:467
> > #18 0xffffffff804c721f in devfs_ioctl_f (fp=0xfffff800afba1550,
> > com=2151703657, data=0xfffffe00dc0efa20, cred=0xfffff800af2dc800,
> > td=0xfffff80005e2ca00)
> > at /usr/src/sys/fs/devfs/devfs_vnops.c:815
> > #19 0xffffffff806377fe in kern_ioctl (td=<value optimized out>,
> > fd=<value optimized out>, com=<value optimized out>,
> > data=0xfffffe00dc0efa20 "") at file.h:327
> > #20 0xffffffff80637481 in sys_ioctl (td=0xfffff80005e2ca00,
> > uap=0xfffffe00dc0efb80) at /usr/src/sys/kern/sys_generic.c:743
> > #21 0xffffffff809b5e79 in amd64_syscall (td=<value optimized out>,
> > traced=0) at subr_syscall.c:135
> > #22 0xffffffff8099a06b in Xfast_syscall () at
> > /usr/src/sys/amd64/amd64/exception.S:396
> > #23 0x00000008024f57ca in ?? ()
> > Previous frame inner to this frame (corrupt stack?)
> > Current language: auto; currently minimal
> >
> > Any hints welcome,
> >
> > imb
> >
> >
> >
> > _______________________________________________
> > freebsd-current@freebsd.org <javascript:;> mailing list
> > https://lists.freebsd.org/mailman/listinfo/freebsd-current
> > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org
> > <javascript:;>"
> >
> _______________________________________________
> freebsd-current@freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-current
> To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1551419a1db.12929035f45012.326107747932338888>