Messages in this thread | | | Date | Tue, 3 Jan 2006 17:45:47 +0100 | From | Ingo Molnar <> | Subject | [patch 00/19] mutex subsystem, -V12 |
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this is version -V12 of the generic mutex subsystem, against v2.6.15. It consists of the following 19 patches:
add-atomic-xchg.patch add-function-typecheck.patch
mutex-generic-asm-implementations.patch mutex-asm-mutex.h-i386.patch mutex-asm-mutex.h-x86_64.patch mutex-asm-mutex.h-arm.patch mutex-arch-mutex-h.patch mutex-core.patch
mutex-docs.patch mutex-debug.patch mutex-debug-more.patch
sem2mutex-xfs.patch sem2mutex-vfs-i-sem.patch sem2mutex-vfs-i-sem-more.patch sem2mutex-simple-ones.patch
sem2completion-sx8.patch sem2completion-cpu5wdt.patch sem2completion-ide-gendev.patch sem2completion-loop.patch
the patches should work fine on every Linux architecture. They can also be downloaded from:
http://redhat.com/~mingo/generic-mutex-subsystem/
Changes since -V11:
2 files changed, 50 insertions(+), 138 deletions(-)
- removed asm/semaphore.h from sx8.c (noticed by Nick Piggin)
- simplified the mutex locking slowpath, and merged the interruptible and non-interruptible variants. This also fixes a small queueing-fairness bug noticed by David Howells: tasks woken up by some _other_ waitqueue might jump the wait-queue in the previous code, and create unfairness. In this queueing variant we keep the task queued all the time - if it retries it simply stays at the head of the queue. This should also be more efficient. mutex.o got 10% smaller as well, as the result of the unification of logic.
- cleanup: removed smaller inlined-once functions and merged them into their usage sites.
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