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>
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| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 248 bytes |
| Makefile | -rw-r--r-- | 992 bytes |
| af_llc.c | -rw-r--r-- | 31.0 KB |
| llc_c_ac.c | -rw-r--r-- | 35.4 KB |
| llc_c_ev.c | -rw-r--r-- | 21.3 KB |
| llc_c_st.c | -rw-r--r-- | 149.8 KB |
| llc_conn.c | -rw-r--r-- | 27.2 KB |
| llc_core.c | -rw-r--r-- | 4.2 KB |
| llc_if.c | -rw-r--r-- | 4.4 KB |
| llc_input.c | -rw-r--r-- | 5.9 KB |
| llc_output.c | -rw-r--r-- | 2.3 KB |
| llc_pdu.c | -rw-r--r-- | 10.6 KB |
| llc_proc.c | -rw-r--r-- | 6.6 KB |
| llc_s_ac.c | -rw-r--r-- | 5.9 KB |
| llc_s_ev.c | -rw-r--r-- | 3.5 KB |
| llc_s_st.c | -rw-r--r-- | 5.7 KB |
| llc_sap.c | -rw-r--r-- | 11.3 KB |
| llc_station.c | -rw-r--r-- | 3.2 KB |
| sysctl_net_llc.c | -rw-r--r-- | 1.7 KB |
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