Revision 1fb9341ac34825aa40354e74d9a2c69df7d2c304 authored by Rusty Russell on 12 January 2013, 02:57:34 UTC, committed by Rusty Russell on 12 January 2013, 02:57:46 UTC
Prarit's excellent bug report: > In recent Fedora releases (F17 & F18) some users have reported seeing > messages similar to > > [ 15.478160] kvm: Could not allocate 304 bytes percpu data > [ 15.478174] PERCPU: allocation failed, size=304 align=32, alloc from > reserved chunk failed > > during system boot. In some cases, users have also reported seeing this > message along with a failed load of other modules. > > What is happening is systemd is loading an instance of the kvm module for > each cpu found (see commit e9bda3b). When the module load occurs the kernel > currently allocates the modules percpu data area prior to checking to see > if the module is already loaded or is in the process of being loaded. If > the module is already loaded, or finishes load, the module loading code > releases the current instance's module's percpu data. Now we have a new state MODULE_STATE_UNFORMED, we can insert the module into the list (and thus guarantee its uniqueness) before we allocate the per-cpu region. Reported-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Tested-by: Prarit Bhargava <prarit@redhat.com>
1 parent 0d21b0e
| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 8.3 KB |
| Makefile | -rw-r--r-- | 1.3 KB |
| aes_ccm.c | -rw-r--r-- | 3.4 KB |
| aes_ccm.h | -rw-r--r-- | 784 bytes |
| aes_cmac.c | -rw-r--r-- | 3.0 KB |
| aes_cmac.h | -rw-r--r-- | 574 bytes |
| agg-rx.c | -rw-r--r-- | 10.9 KB |
| agg-tx.c | -rw-r--r-- | 26.0 KB |
| cfg.c | -rw-r--r-- | 85.3 KB |
| cfg.h | -rw-r--r-- | 155 bytes |
| chan.c | -rw-r--r-- | 8.3 KB |
| debug.h | -rw-r--r-- | 4.3 KB |
| debugfs.c | -rw-r--r-- | 10.4 KB |
| debugfs.h | -rw-r--r-- | 375 bytes |
| debugfs_key.c | -rw-r--r-- | 9.4 KB |
| debugfs_key.h | -rw-r--r-- | 1.1 KB |
| debugfs_netdev.c | -rw-r--r-- | 19.9 KB |
| debugfs_netdev.h | -rw-r--r-- | 706 bytes |
| debugfs_sta.c | -rw-r--r-- | 13.0 KB |
| debugfs_sta.h | -rw-r--r-- | 427 bytes |
| driver-ops.h | -rw-r--r-- | 24.3 KB |
| event.c | -rw-r--r-- | 913 bytes |
| ht.c | -rw-r--r-- | 12.0 KB |
| ibss.c | -rw-r--r-- | 32.6 KB |
| ieee80211_i.h | -rw-r--r-- | 48.7 KB |
| iface.c | -rw-r--r-- | 43.2 KB |
| key.c | -rw-r--r-- | 17.5 KB |
| key.h | -rw-r--r-- | 3.9 KB |
| led.c | -rw-r--r-- | 7.9 KB |
| led.h | -rw-r--r-- | 2.1 KB |
| main.c | -rw-r--r-- | 32.4 KB |
| mesh.c | -rw-r--r-- | 23.2 KB |
| mesh.h | -rw-r--r-- | 12.7 KB |
| mesh_hwmp.c | -rw-r--r-- | 34.0 KB |
| mesh_pathtbl.c | -rw-r--r-- | 28.8 KB |
| mesh_plink.c | -rw-r--r-- | 25.5 KB |
| mesh_sync.c | -rw-r--r-- | 6.7 KB |
| michael.c | -rw-r--r-- | 2.2 KB |
| michael.h | -rw-r--r-- | 573 bytes |
| mlme.c | -rw-r--r-- | 111.4 KB |
| offchannel.c | -rw-r--r-- | 12.7 KB |
| pm.c | -rw-r--r-- | 5.0 KB |
| rate.c | -rw-r--r-- | 12.9 KB |
| rate.h | -rw-r--r-- | 4.4 KB |
| rc80211_minstrel.c | -rw-r--r-- | 15.8 KB |
| rc80211_minstrel.h | -rw-r--r-- | 2.3 KB |
| rc80211_minstrel_debugfs.c | -rw-r--r-- | 4.7 KB |
| rc80211_minstrel_ht.c | -rw-r--r-- | 23.0 KB |
| rc80211_minstrel_ht.h | -rw-r--r-- | 2.9 KB |
| rc80211_minstrel_ht_debugfs.c | -rw-r--r-- | 3.3 KB |
| rc80211_pid.h | -rw-r--r-- | 7.7 KB |
| rc80211_pid_algo.c | -rw-r--r-- | 14.6 KB |
| rc80211_pid_debugfs.c | -rw-r--r-- | 5.9 KB |
| rx.c | -rw-r--r-- | 90.0 KB |
| scan.c | -rw-r--r-- | 26.9 KB |
| spectmgmt.c | -rw-r--r-- | 2.8 KB |
| sta_info.c | -rw-r--r-- | 37.0 KB |
| sta_info.h | -rw-r--r-- | 18.9 KB |
| status.c | -rw-r--r-- | 20.1 KB |
| tkip.c | -rw-r--r-- | 10.7 KB |
| tkip.h | -rw-r--r-- | 917 bytes |
| trace.c | -rw-r--r-- | 1.2 KB |
| trace.h | -rw-r--r-- | 37.2 KB |
| tx.c | -rw-r--r-- | 77.1 KB |
| util.c | -rw-r--r-- | 53.7 KB |
| vht.c | -rw-r--r-- | 923 bytes |
| wep.c | -rw-r--r-- | 9.5 KB |
| wep.h | -rw-r--r-- | 1.1 KB |
| wme.c | -rw-r--r-- | 4.5 KB |
| wme.h | -rw-r--r-- | 748 bytes |
| wpa.c | -rw-r--r-- | 17.3 KB |
| wpa.h | -rw-r--r-- | 1.1 KB |
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