Project

General

Profile

Actions

Bug #2137

closed

vm_prefault: Warning, backing object race averted lobject

Added by y0n3t4n1 over 12 years ago. Updated over 2 years ago.

Status:
Closed
Priority:
Normal
Assignee:
-
Category:
-
Target version:
Start date:
Due date:
% Done:

0%

Estimated time:

Description

Hello.
As I wrote in issue2118, after the fix (1f8fc82a) I started seeing
warning messages on the console under load:

vm_prefault: Warning, backing object race averted lobject 0xffffffe0749d3210

The system used to panic(backtrace at the end of this message) within
a day or two, but with the kernel built from more recent source(fa7cb8ce),
it no longer panics (well, at least for 4 days) running the same load
(pkgsrc bulk build with MAKE_JOBS=5 defined), just the warning messages
shown above all over the console.

#4  0xffffffff8039c50f in panic (
fmt=0xffffffff805edf90 "Bad link elm %p prev->next != elm")
at /usr/src/sys/kern/kern_shutdown.c:833
#5 0xffffffff80532b35 in vm_object_deallocate_locked (
object=0xffffffe0690b2d10) at /usr/src/sys/vm/vm_object.c:601
#6 0xffffffff80532c0f in vm_object_deallocate (object=0xffffffe06b9eed10)
at /usr/src/sys/vm/vm_object.c:451
#7 0xffffffff8052d5bd in vm_map_entry_delete (countp=<optimized out>,
entry=<optimized out>, map=<optimized out>)
at /usr/src/sys/vm/vm_map.c:2608
#8 vm_map_delete (map=0xffffffe05b0d9a00, start=<optimized out>,
end=140737488355328, countp=<optimized out>)
at /usr/src/sys/vm/vm_map.c:2753
#9 0xffffffff8052d661 in vm_map_remove (map=0xffffffe05b0d9a00, start=0,
end=<unavailable>) at /usr/src/sys/vm/vm_map.c:2774
#10 0xffffffff8052d6e9 in vmspace_terminate (vm=0xffffffe05b0d9a00)
at /usr/src/sys/vm/vm_map.c:310
#11 0xffffffff80370579 in _sysref_put (sr=0xffffffe05b0d9bd0)
at /usr/src/sys/kern/kern_sysref.c:325
#12 0xffffffff80388079 in sysref_put (sr=<optimized out>)
at /usr/src/sys/sys/sysref2.h:83
#13 exit1 (rv=<optimized out>) at /usr/src/sys/kern/kern_exit.c:417
#14 0xffffffff803884a4 in sys_exit (uap=<optimized out>)
at /usr/src/sys/kern/kern_exit.c:121
#15 0xffffffff805b0308 in syscall2 (frame=0xffffffe076d33c08)
at /usr/src/sys/platform/pc64/x86_64/trap.c:1188
#16 0xffffffff805a88df in Xfast_syscall ()
at /usr/src/sys/platform/pc64/x86_64/exception.S:320
#17 0x000000000000002b in ?? ()

Best Regards,
YONETANI Tomokazu

Actions

Also available in: Atom PDF