The patch titled
BUG at net/sunrpc/svc.c:128
has been added to the -mm tree. Its filename is
replace-highest_possible_node_id-with-nr_node_ids-fix.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: BUG at net/sunrpc/svc.c:128
From: Frederik Deweerdt <deweerdt@xxxxxxx>
The svc_pool_map_init_percpu() should get maxpool from the number of online
cpus, not the number of nodes. The following BUG is triggered when we try
to check if the cpu index is smaller than the number of nodes. (The system
is multi cpu, single node).
[ 133.196276] ------------[ cut here ]------------
[ 133.196334] kernel BUG at net/sunrpc/svc.c:128!
[ 133.196391] invalid opcode: 0000 [#1]
[ 133.196444] PREEMPT SMP
[ 133.196571] last sysfs file: /devices/pci0000:00/0000:00:00.0/class
[ 133.196630] Modules linked in: nfsd exportfs lockd sunrpc ipv6 i2c_dev i2c_core video thermal sony_acpi processor fan button battery asus_acpi ac uhci_hcd ehci_hcd rng_core
[ 133.197473] CPU: 0
[ 133.197474] EIP: 0060:[<f8a5973c>] Not tainted VLI
[ 133.197475] EFLAGS: 00010202 (2.6.20-rc6-mm2 #1)
[ 133.197656] EIP is at svc_pool_map_init_percpu+0x54/0x5a [sunrpc]
[ 133.197715] eax: 00000002 ebx: f8a762e4 ecx: 00000002 edx: 00000008
[ 133.197776] esi: 00000002 edi: f8aa71e0 ebp: c2fd3edc esp: c2fd3ed4
[ 133.197835] ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
[ 133.197894] Process rpc.nfsd (pid: 3595, ti=c2fd2000 task=f7e22030 task.ti=c2fd2000)
[ 133.197954] Stack: f8a7c081 00040000 c2fd3ee4 f8a597de c2fd3efc f8a59a55 c2fd3f10 00000000
[ 133.198360] 00000008 00000801 c2fd3f54 f8a7c1ac f8a7c4e9 00000001 f8aa9480 fffdd1fe
[ 133.198769] 00000292 f8aa9140 00015f90 0007dbcc 00078804 00000000 0000076e 00000008
[ 133.199175] Call Trace:
[ 133.199275] [<c010390d>] show_trace_log_lvl+0x1a/0x30
[ 133.199373] [<c01039c4>] show_stack_log_lvl+0x8d/0xb1
[ 133.199467] [<c0103bf1>] show_registers+0x1c0/0x336
[ 133.199561] [<c0103efd>] die+0x11f/0x213
[ 133.199654] [<c010406a>] do_trap+0x79/0xa7
[ 133.199748] [<c010433b>] do_invalid_op+0xa3/0xad
[ 133.199842] [<c03ee3a4>] error_code+0x7c/0x84
[ 133.199936] [<f8a597de>] svc_pool_map_init+0x4c/0x60 [sunrpc]
[ 133.200047] [<f8a59a55>] svc_create_pooled+0x14/0x44 [sunrpc]
[ 133.200156] [<f8a7c1ac>] nfsd_create_serv+0x5a/0xd4 [nfsd]
[ 133.200262] [<f8a7c498>] nfsd_svc+0x50/0xa1 [nfsd]
[ 133.200364] [<f8a7ca1f>] write_svc+0x1a/0x20 [nfsd]
[ 133.200466] [<f8a7c98a>] nfsctl_transaction_write+0x4a/0x6d [nfsd]
[ 133.200571] [<c019f29e>] sys_nfsservctl+0xa3/0xe5
[ 133.200666] [<c0102a94>] sysenter_past_esp+0x5d/0x99
[ 133.200762] =======================
[ 133.200816] Code: c1 77 22 83 fe 01 77 23 8b 43 0c ba 10 3f 54 c0 89 34 88 8b 43 08 89 0c b0 89 c8 83 c6 01 e8 4e 8f 7b c7 eb d7 5b 89 f0 5e 5d c3 <0f> 0b 89 f6 eb fc 55 ba 01 00 00 00 89 e5 56 31 f6 53 89 c3 e8
[ 133.203330] EIP: [<f8a5973c>] svc_pool_map_init_percpu+0x54/0x5a [sunrpc] SS:ESP 0068:c2fd3ed4
The following patch fixes the problem for me.
Signed-off-by: Frederik Deweerdt <frederik.deweerdt@xxxxxxxxx>
Cc: Christoph Lameter <clameter@xxxxxxx>
Cc: Neil Brown <neilb@xxxxxxx>
Cc: Trond Myklebust <trond.myklebust@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
net/sunrpc/svc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN net/sunrpc/svc.c~replace-highest_possible_node_id-with-nr_node_ids-fix net/sunrpc/svc.c
--- a/net/sunrpc/svc.c~replace-highest_possible_node_id-with-nr_node_ids-fix
+++ a/net/sunrpc/svc.c
@@ -115,7 +115,7 @@ fail:
static int
svc_pool_map_init_percpu(struct svc_pool_map *m)
{
- unsigned int maxpools = nr_node_ids;
+ unsigned int maxpools = num_online_cpus();
unsigned int pidx = 0;
unsigned int cpu;
int err;
_
Patches currently in -mm which might be from deweerdt@xxxxxxx are
remove-tcp-header-from-tcp_v4_check-take-2.patch
disable-init-initramfsc-updated-fix.patch
replace-highest_possible_node_id-with-nr_node_ids-fix.patch
user-ns-prepare-copy_tree-copy_mnt-and-their-callers-to-handle-errs-fix.patch
user-ns-implement-user-ns-unshare.patch
reiser4-sb_sync_inodes-fix.patch
-
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