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| /freebsd-9.3-release/sys/i386/xen/ | ||
| H A D | pmap.c | diff 216960 Tue Jan 04 14:05:53 MST 2011 cperciva Add hamfisted locking to the Xen/PV pmap code: Only allow one thread to be in {pmap_pinit, pmap_copy, pmap_release} at a time. This reduces the rate of panics when running 'make index' from ~0.6/hour to ~0.02/hour (p < 10^-30). At a later date this locking will be removed, and for this reason, it is wrapped in #ifdef HAMFISTED_LOCKING; this temporary hack is being put in place with the intention of shipping somewhat-stable Xen bits in FreeBSD 8.2-RELEASE. PR: kern/153672 MFC after: 3 days |
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