Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Martin Schwidefsky ef6edc9746 [PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks ... On systems running with virtual cpus there is optimization potential in regard to spinlocks and rw-locks. If the virtual cpu that has taken a lock is known to a cpu that wants to acquire the same lock it is beneficial to yield the timeslice of the virtual cpu in favour of the cpu that has the lock (directed yield). With CONFIG_PREEMPT="n" this can be implemented by the architecture without common code changes. Powerpc already does this. With CONFIG_PREEMPT="y" the lock loops are coded with _raw_spin_trylock, _raw_read_trylock and _raw_write_trylock in kernel/spinlock.c. If the lock could not be taken cpu_relax is called. A directed yield is not possible because cpu_relax doesn't know anything about the lock. To be able to yield the lock in favour of the current lock holder variants of cpu_relax for spinlocks and rw-locks are needed. The new _raw_spin_relax, _raw_read_relax and _raw_write_relax primitives differ from cpu_relax insofar that they have an argument: a pointer to the lock structure. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-10-01 00:39:21 -07:00
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arch-v10	Clean up exported headers on CRIS	2006-09-21 09:33:55 +01:00
arch-v32	[PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks	2006-10-01 00:39:21 -07:00
a.out.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
atomic.h	[PATCH] mutex subsystem, add atomic_xchg() to all arches	2006-01-09 15:59:17 -08:00
auxvec.h	[PATCH] auxiliary vector cleanups	2005-09-07 16:57:21 -07:00
axisflashmap.h	[PATCH] CRIS update: misc patches	2005-07-27 16:26:00 -07:00
bitops.h	[PATCH] bitops: cris: use generic bitops	2006-03-26 08:57:12 -08:00
bug.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
bugs.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
byteorder.h	Clean up exported headers on CRIS	2006-09-21 09:33:55 +01:00
cache.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
cacheflush.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
checksum.h	[PATCH] cris: "extern inline" -> "static inline"	2005-11-07 07:53:30 -08:00
cputime.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
current.h	[PATCH] cris: "extern inline" -> "static inline"	2005-11-07 07:53:30 -08:00
delay.h	[PATCH] cris: "extern inline" -> "static inline"	2005-11-07 07:53:30 -08:00
div64.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
dma-mapping.h	[PATCH] Kill L1_CACHE_SHIFT_MAX	2006-01-08 20:13:39 -08:00
dma.h	[PATCH] CRIS update: pci	2005-07-27 16:26:00 -07:00
elf.h	Clean up exported headers on CRIS	2006-09-21 09:33:55 +01:00
emergency-restart.h	[PATCH] Add emergency_restart()	2005-07-26 14:35:41 -07:00
errno.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
eshlibld.h	Don't include linux/config.h from anywhere else in include/	2006-04-26 12:56:16 +01:00
ethernet.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
etraxgpio.h	Don't include linux/config.h from anywhere else in include/	2006-04-26 12:56:16 +01:00
etraxi2c.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
fasttimer.h	Don't include linux/config.h from anywhere else in include/	2006-04-26 12:56:16 +01:00
fcntl.h	[PATCH] Clean up struct flock64 definitions	2005-09-07 16:57:38 -07:00
futex.h	[PATCH] consolidate asm/futex.h	2006-01-08 20:13:39 -08:00
hardirq.h	[PATCH] CRIS update: IRQ	2005-07-27 16:26:00 -07:00
hw_irq.h	[PATCH] genirq: add ->retrigger() irq op to consolidate hw_irq_resend()	2006-06-29 10:26:23 -07:00
ide.h	[PATCH] CRIS update: drivers	2005-07-27 16:25:59 -07:00
io.h	[PATCH] cris: "extern inline" -> "static inline"	2005-11-07 07:53:30 -08:00
ioctl.h	[PATCH] Generic ioctl.h	2006-01-10 08:01:34 -08:00
ioctls.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
ipc.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
ipcbuf.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
irq.h	[PATCH] genirq: cleanup: turn ARCH_HAS_IRQ_PER_CPU into CONFIG_IRQ_PER_CPU	2006-06-29 10:26:23 -07:00
Kbuild	Clean up exported headers on CRIS	2006-09-21 09:33:55 +01:00
kmap_types.h	[PATCH] CRIS update: updates for 2.6.12	2005-07-27 16:26:01 -07:00
linkage.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
local.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
mman.h	[PATCH] add asm-generic/mman.h	2006-02-15 15:32:22 -08:00
mmu.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
mmu_context.h	[PATCH] CRIS update: SMP	2005-07-27 16:26:01 -07:00
module.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
msgbuf.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
mutex.h	[PATCH] mutex subsystem, add default include/asm-*/mutex.h files	2006-01-09 15:59:19 -08:00
namei.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
page.h	Clean up exported headers on CRIS	2006-09-21 09:33:55 +01:00
param.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
pci.h	Don't include linux/config.h from anywhere else in include/	2006-04-26 12:56:16 +01:00
percpu.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
pgalloc.h	[PATCH] cris: "extern inline" -> "static inline"	2005-11-07 07:53:30 -08:00
pgtable.h	[PATCH] Standardize pxx_page macros	2006-09-26 08:48:51 -07:00
poll.h	[PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications	2006-03-25 08:22:56 -08:00
posix_types.h	Clean up exported headers on CRIS	2006-09-21 09:33:55 +01:00
processor.h	Don't include linux/config.h from anywhere else in include/	2006-04-26 12:56:16 +01:00
ptrace.h	[PATCH] CRIS update: profiler	2005-07-27 16:26:00 -07:00
resource.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
rs485.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
rtc.h	Don't include linux/config.h from anywhere else in include/	2006-04-26 12:56:16 +01:00
scatterlist.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
sections.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
segment.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
semaphore-helper.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
semaphore.h	[PATCH] cris: "extern inline" -> "static inline"	2005-11-07 07:53:30 -08:00
sembuf.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
setup.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
shmbuf.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
shmparam.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
sigcontext.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
siginfo.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
signal.h	[PATCH] irq-flags: CRIS: Use the new IRQF_ constants	2006-07-02 13:58:46 -07:00
smp.h	[PATCH] CRIS update: SMP	2005-07-27 16:26:01 -07:00
socket.h	[AF_UNIX]: Datagram getpeersec	2006-06-29 16:58:06 -07:00
sockios.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
spinlock.h	[PATCH] CRIS update: SMP	2005-07-27 16:26:01 -07:00
stat.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
statfs.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
string.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
sync_serial.h	[PATCH] CRIS update: synchronous serial port driver	2005-07-27 16:26:01 -07:00
system.h	[PATCH] remove set_wmb - arch removal	2006-07-14 21:56:14 -07:00
termbits.h	[PATCH] CRIS update: synchronous serial port driver	2005-07-27 16:26:01 -07:00
termios.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
thread_info.h	[PATCH] death of get_thread_info/put_thread_info	2006-01-12 09:08:59 -08:00
timex.h	[PATCH] cris: "extern inline" -> "static inline"	2005-11-07 07:53:30 -08:00
tlb.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
tlbflush.h	Don't include linux/config.h from anywhere else in include/	2006-04-26 12:56:16 +01:00
topology.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
types.h	[PATCH] sab: consolidate kmem_bufctl_t	2005-09-05 00:05:48 -07:00
uaccess.h	[PATCH] cris: "extern inline" -> "static inline"	2005-11-07 07:53:30 -08:00
ucontext.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
unaligned.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
unistd.h	Clean up exported headers on CRIS	2006-09-21 09:33:55 +01:00
user.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00