Date: Sun, 18 Apr 2010 07:42:43 -0400 (EDT) From: Ben Wilber <bw@exodus.desync.com> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/145802: [zfs] page fault under load Message-ID: <201004181142.o3IBghVJ005939@exodus.desync.com> Resent-Message-ID: <201004181150.o3IBo1Lm099466@freefall.freebsd.org>
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>Number: 145802
>Category: kern
>Synopsis: [zfs] page fault under load
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Apr 18 11:50:01 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator: Ben Wilber
>Release: FreeBSD 9.0-CURRENT amd64
>Organization:
>Environment:
System: FreeBSD exodus 9.0-CURRENT FreeBSD 9.0-CURRENT #0: Thu Apr 15 14:30:10 EDT 2010 bw@exodus:/usr/obj/usr/src/sys/GENERIC amd64
% zpool status -v
pool: int
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
int ONLINE 0 0 0
mfid0s1d ONLINE 0 0 0
logs ONLINE 0 0 0
ad6s1 ONLINE 0 0 0
cache
ad6s3 ONLINE 0 0 0
errors: No known data errors
pool: tank
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
tank ONLINE 0 0 0
raidz1 ONLINE 0 0 0
mfid1 ONLINE 0 0 0
mfid2 ONLINE 0 0 0
mfid3 ONLINE 0 0 0
mfid4 ONLINE 0 0 0
raidz1 ONLINE 0 0 0
mfid5 ONLINE 0 0 0
mfid6 ONLINE 0 0 0
mfid7 ONLINE 0 0 0
mfid8 ONLINE 0 0 0
raidz1 ONLINE 0 0 0
mfid9 ONLINE 0 0 0
mfid10 ONLINE 0 0 0
mfid11 ONLINE 0 0 0
mfid12 ONLINE 0 0 0
raidz1 ONLINE 0 0 0
mfid13 ONLINE 0 0 0
mfid14 ONLINE 0 0 0
mfid15 ONLINE 0 0 0
mfid16 ONLINE 0 0 0
raidz1 ONLINE 0 0 0
mfid17 ONLINE 0 0 0
mfid18 ONLINE 0 0 0
mfid19 ONLINE 0 0 0
mfid20 ONLINE 0 0 0
logs ONLINE 0 0 0
ad6s2 ONLINE 0 0 0
cache
ad6s4 ONLINE 0 0 0
spares
mfid21 AVAIL
mfid22 AVAIL
mfid23 AVAIL
errors: No known data errors
>Description:
Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 11
fault virtual address = 0xffffff81b2f59000
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff808538f6
stack pointer = 0x28:0xffffff83997a4a80
frame pointer = 0x28:0xffffff83997a4b00
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 (spa_zio)
db:0:kdb.enter.default> bt
Tracing pid 0 tid 100156 td 0xffffff000cc63000
bcopy() at bcopy+0x16
vdev_queue_io_done() at vdev_queue_io_done+0x99
zio_vdev_io_done() at zio_vdev_io_done+0xd0
zio_execute() at zio_execute+0x70
taskq_run() at taskq_run+0x13
taskqueue_run() at taskqueue_run+0xeb
taskqueue_thread_loop() at taskqueue_thread_loop+0x50
fork_exit() at fork_exit+0x147
fork_trampoline() at fork_trampoline+0xe
--- trap 0, rip = 0, rsp = 0xffffff83997a4d30, rbp = 0 ---
>How-To-Repeat:
Unknown. Started after adding more disks to "tank".
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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