Messages in this thread | | | Subject | Updated preempt-kernel patches | From | Robert Love <> | Date | 12 Oct 2001 16:19:36 -0400 |
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Updated preempt-kernel patches for 2.4.10, 2.4.12, 2.4.13-pre1, and (phew!) 2.4.12-ac1 are available at:
http://tech9.net/rml/linux
Note the patches for 2.4.10 are updated over previously releases.
These patches allow create a preemptible kernel -- increasing system response time. Everyone is encouraged to give it a whirl and report back.
Major changes include code to prevent CPU changes on preempt (should prevent a class of race conditions), an SMP compile fix, and various cleanups.
Full change log:
20011011 - remove pgalloc.h preemption disable statements -- not needed with the new CPU switch prevention - fix compile on SMP in some configurations (ac tree only)
20011005 - rearrange sched.c so we can patch cleanly against rtsched (or vice versa)
20011004 - prevent the case of preemption causing a CPU switch by locking tasks to the current CPU in preempt_schedule - revert to _raw_spin_xxx from _spin_xxx since PPC uses that convention.
20011003 - push pcmcia-cs tools fix into their next release
20011001 - fix spin_lock_prefetch optimization causing (harmless) compile warnings
Robert Love
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