linux-legacy

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Christian Ehrhardt 96567161de [PATCH] s390: Increase spinlock retry code performance

Currently the code tries up to spin_retry times to grab a lock using the cs
instruction.  The cs instruction has exclusive access to a memory region
and therefore invalidates the appropiate cache line of all other cpus.  If
there is contention on a lock this leads to cache line trashing.  This can
be avoided if we first check wether a cs instruction is likely to succeed
before the instruction gets actually executed.

Signed-off-by: Christian Ehrhardt <ehrhardt@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2006-03-09 19:47:38 -08:00

delay.c

[PATCH] s390: fix __delay implementation

2006-02-14 16:09:35 -08:00

Makefile

[PATCH] s390: Remove CVS generated information

2006-02-01 08:53:23 -08:00

spinlock.c

[PATCH] s390: Increase spinlock retry code performance

2006-03-09 19:47:38 -08:00

string.c

Linux-2.6.12-rc2