netdev - 2.6.39-rc7-git11, x86/32, failed on ppp2897'th interface, PERCPU: allocation failed

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Date:	Thu, 19 May 2011 09:35:29 +0300
From:	Denys Fedoryshchenko <denys@...p.net.lb>
To:	<netdev@...r.kernel.org>
Subject: 2.6.39-rc7-git11, x86/32, failed on ppp2897'th interface, PERCPU:  allocation failed

 Hi, again

 Just tried to upgrade large NAS from 2.6.38.6 to 2.6.39-rc7-git11, and 
 at same time enabling ipv6 on it.
 Got that, after ppp2897 brought up (sure it means there is other 2896 
 available, and also few ethernet vlans, around 32).
 I am not sure it is a bug, but it looks i had free memory(the box had 
 8GB free), and lowmem too, also i will try to enable there 64bit kernel 
 at evening.

 May 17 16:00:42 194.146.155.70 kernel: [14925.897799] PERCPU: 
 allocation failed, size=2048 align=4, failed to allocate new chunk
 May 17 16:00:42 194.146.155.70 kernel: [14925.898163] Pid: 24207, comm: 
 pppd Not tainted 2.6.39-rc7-git11-build-0058 #4
 May 17 16:00:42 194.146.155.70 kernel: [14925.898164] Call Trace:
 May 17 16:00:42 194.146.155.70 kernel: [14925.898169]  [<c0335548>] ? 
 printk+0x18/0x20
 May 17 16:00:42 194.146.155.70 kernel: [14925.898173]  [<c017ecd0>] 
 pcpu_alloc+0x616/0x67a
 May 17 16:00:42 194.146.155.70 kernel: [14925.898176]  [<c0194a80>] ? 
 __kmalloc_track_caller+0x68/0xc0
 May 17 16:00:42 194.146.155.70 kernel: [14925.898189]  [<f8ae196c>] ? 
 kzalloc+0xb/0xd [ipv6]
 May 17 16:00:42 194.146.155.70 kernel: [14925.898193]  [<c01320a5>] ? 
 _local_bh_enable_ip.clone.6+0x18/0x71
 May 17 16:00:42 194.146.155.70 kernel: [14925.898195]  [<c017ed3e>] 
 __alloc_percpu+0xa/0xc
 May 17 16:00:42 194.146.155.70 kernel: [14925.898198]  [<c030aa7d>] 
 snmp_mib_init+0x2f/0x51
 May 17 16:00:42 194.146.155.70 kernel: [14925.898207]  [<f8ae2ad0>] 
 ipv6_add_dev+0x133/0x2a3 [ipv6]
 May 17 16:00:42 194.146.155.70 kernel: [14925.898209]  [<c030e12d>] ? 
 ip_mc_init_dev+0x75/0x86
 May 17 16:00:42 194.146.155.70 kernel: [14925.898211]  [<c0309321>] ? 
 devinet_sysctl_register+0x34/0x38
 May 17 16:00:42 194.146.155.70 kernel: [14925.898221]  [<f8ae5754>] 
 addrconf_notify+0x50/0x6a5 [ipv6]
 May 17 16:00:42 194.146.155.70 kernel: [14925.898224]  [<c0218f52>] ? 
 add_uevent_var+0xa3/0xa3
 May 17 16:00:42 194.146.155.70 kernel: [14925.898226]  [<c0309901>] ? 
 inetdev_event+0x55/0x3c0
 May 17 16:00:42 194.146.155.70 kernel: [14925.898230]  [<c01446f9>] 
 notifier_call_chain+0x26/0x48
 May 17 16:00:42 194.146.155.70 kernel: [14925.898232]  [<c01447a7>] 
 raw_notifier_call_chain+0x1a/0x1c
 May 17 16:00:42 194.146.155.70 kernel: [14925.898236]  [<c02c8115>] 
 call_netdevice_notifiers+0x44/0x4b
 May 17 16:00:42 194.146.155.70 kernel: [14925.898238]  [<c01320a5>] ? 
 _local_bh_enable_ip.clone.6+0x18/0x71
 May 17 16:00:42 194.146.155.70 kernel: [14925.898240]  [<c0132106>] ? 
 local_bh_enable_ip+0x8/0xa
 May 17 16:00:42 194.146.155.70 kernel: [14925.898242]  [<c02ca19b>] 
 register_netdevice+0x1fb/0x255
 May 17 16:00:42 194.146.155.70 kernel: [14925.898244]  [<c02ca227>] 
 register_netdev+0x32/0x41
 May 17 16:00:42 194.146.155.70 kernel: [14925.898247]  [<c021d5cf>] ? 
 sprintf+0x1c/0x1e
 May 17 16:00:42 194.146.155.70 kernel: [14925.898249]  [<c029647a>] 
 ppp_ioctl+0x224/0xaea
 May 17 16:00:42 194.146.155.70 kernel: [14925.898252]  [<c01a35cc>] ? 
 do_filp_open+0x26/0x67
 May 17 16:00:42 194.146.155.70 kernel: [14925.898254]  [<c0296256>] ? 
 ppp_write+0x98/0x98
 May 17 16:00:42 194.146.155.70 kernel: [14925.898256]  [<c01a53ce>] 
 do_vfs_ioctl+0x45e/0x498
 May 17 16:00:42 194.146.155.70 kernel: [14925.898258]  [<c01a118e>] ? 
 getname_flags+0x1e/0xad
 May 17 16:00:42 194.146.155.70 kernel: [14925.898260]  [<c019391b>] ? 
 kmem_cache_free+0x14/0x83
 May 17 16:00:42 194.146.155.70 kernel: [14925.898262]  [<c01ab5bb>] ? 
 alloc_fd+0x4e/0xba
 May 17 16:00:42 194.146.155.70 kernel: [14925.898265]  [<c0199465>] ? 
 do_sys_open+0xdb/0xe5
 May 17 16:00:42 194.146.155.70 kernel: [14925.898266]  [<c019ac7b>] ? 
 fput+0x13/0x155
 May 17 16:00:42 194.146.155.70 kernel: [14925.898268]  [<c01a4387>] ? 
 do_fcntl+0x227/0x3aa
 May 17 16:00:42 194.146.155.70 kernel: [14925.898270]  [<c01a543b>] 
 sys_ioctl+0x33/0x4c
 May 17 16:00:42 194.146.155.70 kernel: [14925.898273]  [<c0336edd>] 
 syscall_call+0x7/0xb
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