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[DragonFlyBSD - Bug #2269] Panic on KKASSERT((c->c_flags & (CALLOUT_PENDING|CALLOUT_ACTIVE))

From: "G. Isenmann via Redmine" <bugtracker-admin@xxxxxxxxxxxxxxxxxxxxx>
Date: Sun, 22 Jan 2012 22:38:12 -0800

Issue #2269 has been updated by G. Isenmann.

The dump was from Magliano Andrea, but I have seen this panic on one
system at home six times last week.

No panic over the weekend with the latest master. Will again put some
load on this machine, when I get home today.

Bug #2269: Panic on KKASSERT((c->c_flags & (CALLOUT_PENDING|CALLOUT_ACTIVE))

Author: Magliano Andrea
Status: New
Priority: Normal
Target version: 

On v2.13.0.784.gc1745-DEVELOPMENT, x86_64

#0  _get_mycpu () at ./machine/thread.h:69
#1  md_dumpsys (di=<optimized out>)
    at /usr/src/sys/platform/pc64/x86_64/dump_machdep.c:263
#2  0xffffffff802bd915 in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:925
#3  0xffffffff802bdf7b in boot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:387
#4  0xffffffff802be232 in panic (
    fmt=0xffffffff8051bdf0 "assertion \"%s\" failed in %s at %s:%u")
    at /usr/src/sys/kern/kern_shutdown.c:831
#5  0xffffffff802dbeb7 in callout_stop_sync (c=0xffffffe065c82990)
    at /usr/src/sys/kern/kern_timeout.c:519
#6  0xffffffff802dadd0 in sys_setitimer (uap=0xffffffe066028b68)
    at /usr/src/sys/kern/kern_time.c:762
#7  0xffffffff804de981 in syscall2 (frame=0xffffffe066028c18)
    at /usr/src/sys/platform/pc64/x86_64/trap.c:1248
#8  0xffffffff804c806b in Xfast_syscall ()
    at /usr/src/sys/platform/pc64/x86_64/exception.S:323
#9  0x000000000000002b in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Get dump from

I'm still experiencing regularly issue 2092, it could be related to it as ahci_ata_cmd_done() calls callout_stop_sync() (which panic comes from)

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