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Steven Rostedt d769041f86 ring_buffer: implement new locking ... The old "lock always" scheme had issues with lockdep, and was not very efficient anyways. This patch does a new design to be partially lockless on writes. Writes will add new entries to the per cpu pages by simply disabling interrupts. When a write needs to go to another page than it will grab the lock. A new "read page" has been added so that the reader can pull out a page from the ring buffer to read without worrying about the writer writing over it. This allows us to not take the lock for all reads. The lock is now only taken when a read needs to go to a new page. This is far from lockless, and interrupts still need to be disabled, but it is a step towards a more lockless solution, and it also solves a lot of the issues that were noticed by the first conversion of ftrace to the ring buffers. Note: the ring_buffer_{un}lock API has been removed. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		17 years ago
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acpi	ACPICA: Additional error checking for pathname utilities	17 years ago
asm-arm	[ARM] 5191/1: ARM: remove CVS keywords	17 years ago
asm-cris	Reduce brokenness of CRIS headers_install	17 years ago
asm-frv	FRV: Provide ioremap_wc() for FRV	17 years ago
asm-generic	ftrace: create __mcount_loc section	17 years ago
asm-m32r	…
asm-m68k	m68k{,nommu}: Wire up new system calls	17 years ago
asm-mips	MIPS: Move headfiles to new location below arch/mips/include	17 years ago
asm-mn10300	MN10300: Supply ioremap_wc() for MN10300	17 years ago
asm-parisc	signals: demultiplexing SIGTRAP signal	17 years ago
asm-um	net: Fix build with ARCH=um	17 years ago
asm-x86	ftrace: mcount call site on boot nops core	17 years ago
asm-xtensa	…
crypto	crypto: rng - RNG interface and implementation	17 years ago
drm	…
keys	…
linux	ring_buffer: implement new locking	17 years ago
math-emu	…
media	V4L/DVB (8610): Add suspend/resume capabilities to soc_camera.	17 years ago
mtd	…
net	net: fix dummy 'nf_conntrack_event_cache()'	17 years ago
pcmcia	…
rdma	RDMA/cma: Remove padding arrays by using struct sockaddr_storage	17 years ago
rxrpc	…
scsi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	17 years ago
sound	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6	17 years ago
trace	sched: clean up tracepoints	17 years ago
video	Merge branch 'pxa-all' into devel	17 years ago
xen	xen: remove unused balloon.h	17 years ago
Kbuild	…