Date: Thu, 8 Sep 2011 12:10:11 GMT From: "Pavel Polyakov" <bsd@kobyla.org> To: freebsd-geom@FreeBSD.org Subject: Re: kern/158197: [geom] geom_cache with size> 1000 leads to panics Message-ID: <201109081210.p88CABoA034914@freefall.freebsd.org>
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The following reply was made to PR kern/158197; it has been noted by GNATS.
From: "Pavel Polyakov" <bsd@kobyla.org>
To: bug-followup@freebsd.org, bsd@kobyla.org
Cc:
Subject: Re: kern/158197: [geom] geom_cache with size>1000 leads to panics
Date: Thu, 08 Sep 2011 11:57:57 -0000
Still affects on BETA1.
Thu Sep 8 13:58:49 EEST 2011
FreeBSD pp.fss.sunpp 9.0-BETA1 FreeBSD 9.0-BETA1 #0 r224843: Fri Aug 26
16:53:42 EEST 2011 root@pp.fss.sunpp:/usr/obj/usr/src/sys/PDC90 amd64
panic:
Unread portion of the kernel message buffer:
Fatal trap 9: general protection fault while in kernel mode
cpuid = 0; apic id = 00
instruction pointer = 0x20:0xffffffff8110a130
stack pointer = 0x28:0xffffff800024db40
frame pointer = 0x28:0xffffff800024db80
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 = 13 (g_down)
Dumping 1080 out of 4079
MB:..2%..11%..21%..32%..42%..51%..61%..72%..82%..91%
#6 0xffffffff807ee40d in trap_fatal (frame=0xffffff800024da90,
eva=Variable "eva" is not available.
)
at /usr/src/sys/amd64/amd64/trap.c:800
#7 0xffffffff807ee9d5 in trap (frame=0xffffff800024da90)
at /usr/src/sys/amd64/amd64/trap.c:616
#8 0xffffffff807d93bf in calltrap ()
at /usr/src/sys/amd64/amd64/exception.S:228
#9 0xffffffff8110a130 in g_cache_read (sc=0xfffffe00097c7200,
bp=0xfffffe00c5f75570)
at
/usr/src/sys/modules/geom/geom_cache/../../../geom/cache/g_cache.c:117
(kgdb) fr 9
#9 0xffffffff8110a130 in g_cache_read (sc=0xfffffe00097c7200,
bp=0xfffffe00c5f75570)
at
/usr/src/sys/modules/geom/geom_cache/../../../geom/cache/g_cache.c:117
117 TAILQ_REMOVE(&sc->sc_usedlist, dp, d_used);
(kgdb) p sc->sc_usedlist
$2 = {tqh_first = 0xfffffe0083a7b980, tqh_last = 0xfffffe0083a7b9b8}
(kgdb) p *(struct g_cache_desc *) dp
$6 = {d_bno = -2401050962867404578, d_data = 0xdeadc0dedeadc0de <Address
0xdeadc0dedeadc0de out of bounds>, d_biolist = 0xdeadc0dedeadc0de,
d_atime = -2401050962867404578, d_flags = -559038242, d_next = {le_next
= 0xdeadc0dedeadc0de, le_prev = 0xdeadc0dedeadc0de}, d_used = {
tqe_next = 0xdeadc0dedeadc0de, tqe_prev = 0xdeadc0dedeadc0de}}
(kgdb) p d_used
No symbol "d_used" in current context.
#10 0xffffffff8110a6f2 in g_cache_start (bp=0xfffffe00c5f75570)
at
/usr/src/sys/modules/geom/geom_cache/../../../geom/cache/g_cache.c:378
#11 0xffffffff804c6d43 in g_io_schedule_down (tp=Variable "tp" is not
available.
)
at /usr/src/sys/geom/geom_io.c:632
#12 0xffffffff804c71d2 in g_down_procbody (arg=Variable "arg" is not
available.
)
at /usr/src/sys/geom/geom_kern.c:110
#13 0xffffffff804fe685 in fork_exit (
callout=0xffffffff804c7160 <g_down_procbody>, arg=0x0,
frame=0xffffff800024dc50) at /usr/src/sys/kern/kern_fork.c:941
#14 0xffffffff807d98ee in fork_trampoline ()
at /usr/src/sys/amd64/amd64/exception.S:603
----
More detailed core.txt available at
http://bak.sg01.com/tmp/panic55a.txt
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