From: Yao Fei Zhu <walkinair@cn.ibm.com>
To: linux-kernel@vger.kernel.org
Subject: [BUG] 2.6.18 fall into xmon during cpu hotplug and oprofile
Date: Fri, 29 Sep 2006 21:12:52 +0800 [thread overview]
Message-ID: <451D1BD4.9080307@cn.ibm.com> (raw)
Problem description:
cpu hotplug oeration, with oprofile profile session enabled, trigger kernel
2.6.18 into xmon.
Hardware Environment
Machine type (p650, x235, SF2, etc.): B70+
Cpu type (Power4, Power5, IA-64, etc.): POWER5+
Software Environment
Kernel: 2.6.18
OS: RHEL5 Beta1
Additional information:
1:mon> e
cpu 0x1: Vector: 300 (Data Access) at [c0000001f05bf740]
pc: c0000000001ab158: .spin_bug+0x8c/0x100
lr: c0000000001ab138: .spin_bug+0x6c/0x100
sp: c0000001f05bf9c0
msr: 8000000000009032
dar: 6b6b6b6b6b6b6ca7
dsisr: 40000000
current = 0xc0000002015846b0
paca = 0xc000000000444700
pid = 17129, comm = events/1
1:mon> t
[c0000001f05bfa50] c0000000001ab388 ._raw_spin_lock+0x40/0x17c
[c0000001f05bfae0] c000000000333980 ._spin_lock+0x10/0x24
[c0000001f05bfb60] c0000000000631c4 .get_task_mm+0x20/0x80
[c0000001f05bfbf0] d000000000a20eb8 .sync_buffer+0x168/0x4c0 [oprofile]
[c0000001f05bfcd0] d000000000a2091c .wq_sync_buffer+0x44/0x7c [oprofile]
[c0000001f05bfd50] c00000000007a50c .run_workqueue+0xdc/0x168
[c0000001f05bfdf0] c00000000007b278 .worker_thread+0x128/0x198
[c0000001f05bfee0] c00000000007fbd8 .kthread+0x128/0x178
[c0000001f05bff90] c000000000026e9c .kernel_thread+0x4c/0x68
1:mon> r
R00 = c0000000001ab138 R16 = 4000000001c00000
R01 = c0000001f05bf9c0 R17 = c000000000350da8
R02 = c00000000055ce00 R18 = 0000000000000000
R03 = 0000000000000034 R19 = 0000000000169400
R04 = 8000000000001032 R20 = 0000000000000001
R05 = 000000006b6b6b6b R21 = 0000000000000038
R06 = 6b6b6b6b6b6b6e43 R22 = 0000000000000004
R07 = ffffffffffffffff R23 = 0000000000000001
R08 = ffffffffffffffff R24 = 0000000000000000
R09 = c000000000475e68 R25 = 0000000000000001
R10 = c000000000600f80 R26 = 0000000000000000
R11 = c000000000600f78 R27 = d000000000b55db0
R12 = 0000000000004000 R28 = c00000000036f908
R13 = c000000000444700 R29 = c000000002443af8
R14 = 0000000000000000 R30 = c0000000004a3600
R15 = c000000000352378 R31 = 6b6b6b6b6b6b6b6b
pc = c0000000001ab158 .spin_bug+0x8c/0x100
lr = c0000000001ab138 .spin_bug+0x6c/0x100
msr = 8000000000009032 cr = 24000024
ctr = 80000000001af404 xer = 0000000000000002 trap = 300
dar = 6b6b6b6b6b6b6ca7 dsisr = 40000000
1:mon> di c0000000001ab158
c0000000001ab158 e8ff013e lwa r7,316(r31)
c0000000001ab15c 811d0008 lwz r8,8(r29)
c0000000001ab160 e87e8030 ld r3,-32720(r30)
c0000000001ab164 7fa4eb78 mr r4,r29
c0000000001ab168 4beb9bcd bl c000000000064d34 # .printk+0x0/0x48
c0000000001ab16c 60000000 nop
c0000000001ab170 4be64c59 bl c00000000000fdc8 #
.dump_stack+0x0/0xc
c0000000001ab174 60000000 nop
c0000000001ab178 48000034 b c0000000001ab1ac #
.spin_bug+0xe0/0x100
c0000000001ab17c e92d01a0 ld r9,416(r13)
c0000000001ab180 a0ad000a lhz r5,10(r13)
c0000000001ab184 7d635b78 mr r3,r11
c0000000001ab188 7f84e378 mr r4,r28
c0000000001ab18c e8e9013e lwa r7,316(r9)
c0000000001ab190 38c902d8 addi r6,r9,728
c0000000001ab194 4beb9ba1 bl c000000000064d34 # .printk+0x0/0x48
1:mon> mi
Mem-info:
Node 0 DMA per-cpu:
cpu 1 hot: high 6, batch 1 used:0
cpu 1 cold: high 2, batch 1 used:0
cpu 2 hot: high 6, batch 1 used:0
cpu 2 cold: high 2, batch 1 used:0
Node 0 DMA32 per-cpu: empty
Node 0 Normal per-cpu: empty
Node 0 HighMem per-cpu: empty
Free pages: 333248kB (0kB HighMem)
Active:70502 inactive:45626 dirty:43 writeback:0 unstable:0 free:5207 slab:5269
mapped:766 pagetables:199
Node 0 DMA free:333248kB min:11648kB low:14528kB high:17472kB active:4512128kB
inactive:2920064kB present:8519680kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0 0
Node 0 DMA32 free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB
present:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0 0
Node 0 Normal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB
present:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0 0
Node 0 HighMem free:0kB min:2048kB low:2048kB high:2048kB active:0kB
inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0 0
Node 0 DMA: 3*64kB 8*128kB 1*256kB 0*512kB 0*1024kB 8*2048kB 5*4096kB 0*8192kB
18*16384kB = 333248kB
Node 0 DMA32: empty
Node 0 Normal: empty
Node 0 HighMem: empty
Swap cache: add 0, delete 0, find 0/0, race 0+0
Free swap = 2096320kB
Total swap = 2096320kB
Free swap: 2096320kB
133120 pages of RAM
775 reserved pages
70064 pages shared
0 pages swap cached
1:mon>
reply other threads:[~2006-09-29 13:12 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=451D1BD4.9080307@cn.ibm.com \
--to=walkinair@cn.ibm.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.