On Monday 24 May 2010 6:35:01 am Nikolay Denev wrote: > On May 24, 2010, at 8:57 AM, Nikolay Denev wrote: > > > Hi, > > > > Recently I started to experience a if_sge(4) related panic. > > It happens almost every time I try to download a torrent file for example. > > Copying of large files over NFS seem not to trigger it, but I haven't > > tested extensively. > > > > Here is the panic message : > > > > Fatal trap 12: page fault while in kernel mode > > cpuid = 0; apic id = 00 > > fault virtual address = 0x8 > > fault code = supervisor write data, page not > > present > > instruction pointer = 0x20:0xffffffff80230413 > > stack pointer = 0x28:0xffffff80001e9280 > > frame pointer = 0x28:0xffffff80001e9510 > > 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 = 12 (irq19: sge0) > > trap number = 12 > > panic: page fault > > cpuid = 0 > > Uptime: 1d20h56m20s > > Cannot dump. Device not defined or unavailable > > Automatic reboot in 15 seconds - press a key on the console to abort > > Sleeping thread (tid 100039, pid 12) owns a non-sleepable lock > > > > My swap is on a zvol, so I don't have dump. I'll try to attach a disk on > > the eSATA port and dump there if needed. > > Here is some info from the crashdump : > > (kgdb) #0 doadump () at pcpu.h:223 > #1 0xffffffff802fb149 in boot (howto=260) > at /usr/src/sys/kern/kern_shutdown.c:416 > #2 0xffffffff802fb57c in panic (fmt=0xffffffff8055d564 "%s") > at /usr/src/sys/kern/kern_shutdown.c:590 > #3 0xffffffff805055b8 in trap_fatal (frame=0xffffff000288a3e0, eva=Variable > "eva" is not available. > ) > at /usr/src/sys/amd64/amd64/trap.c:777 > #4 0xffffffff805059dc in trap_pfault (frame=0xffffff80001e91d0, usermode=0) > at /usr/src/sys/amd64/amd64/trap.c:693 > #5 0xffffffff805061c5 in trap (frame=0xffffff80001e91d0) > at /usr/src/sys/amd64/amd64/trap.c:451 > #6 0xffffffff804eb977 in calltrap () > at /usr/src/sys/amd64/amd64/exception.S:223 > #7 0xffffffff80230413 in sge_start_locked (ifp=0xffffff000270d800) > at /usr/src/sys/dev/sge/if_sge.c:1591
Try this. sge_encap() can sometimes return an error with m_head set to NULL: Index: if_sge.c =================================================================== --- if_sge.c (revision 208375) +++ if_sge.c (working copy) @@ -1588,7 +1588,8 @@ if (m_head == NULL) break; if (sge_encap(sc, &m_head)) { - IFQ_DRV_PREPEND(&ifp->if_snd, m_head); + if (m_head != NULL) + IFQ_DRV_PREPEND(&ifp->if_snd, m_head); ifp->if_drv_flags |= IFF_DRV_OACTIVE; break; } -- John Baldwin _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"