Jens Axboe 4ac845a2e9 block: cfq: make the io contect sharing lockless ... The io context sharing introduced a per-ioc spinlock, that would protect the cfq io context lookup. That is a regression from the original, since we never needed any locking there because the ioc/cic were process private. The cic lookup is changed from an rbtree construct to a radix tree, which we can then use RCU to make the reader side lockless. That is the performance critical path, modifying the radix tree is only done on process creation (when that process first does IO, actually) and on process exit (if that process has done IO). As it so happens, radix trees are also much faster for this type of lookup where the key is a pointer. It's a very sparse tree. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>		2008-01-28 10:50:33 +01:00
..
acpi	kobject: convert /sys/firmware/acpi/ to use kobject_create	2008-01-24 20:40:23 -08:00
asm-alpha	alpha: build fixes	2007-12-17 19:28:16 -08:00
asm-arm	i2c-pxa: Add polling transfer	2008-01-27 18:14:50 +01:00
asm-avr32	[AVR32] NMI debugging	2008-01-25 08:31:43 +01:00
asm-blackfin	[Blackfin] arch: Add the semtimedop syscall. Upstream uClibc doesn't compile without it.	2008-01-27 19:56:43 +08:00
asm-cris	ide: remove stale ide.h "configuration options"	2008-01-25 22:17:08 +01:00
asm-frv	ide: remove stale ide.h "configuration options"	2008-01-25 22:17:08 +01:00
asm-generic	sched: SCHED_FIFO/SCHED_RR watchdog timer	2008-01-25 21:08:27 +01:00
asm-h8300	asm-h8300: parentheses around definition CLOCK_TICK_RATE	2007-12-10 19:43:54 -08:00
asm-ia64	[IA64] Update Altix BTE error return status patch	2008-01-03 13:18:58 -08:00
asm-m32r	m32r: Update sys_rt_sigsuspend	2007-11-28 01:24:04 +09:00
asm-m68k	Add CONFIG_DEBUG_SG sg validation	2007-10-22 21:20:03 +02:00
asm-m68knommu	m68knommu: fix pread/pwrite defines	2007-11-05 15:12:33 -08:00
asm-mips	[MIPS] SMTC: Fix build error.	2008-01-22 00:35:23 +00:00
asm-parisc	[PARISC] print more than one character at a time for pdc console	2007-12-06 09:32:15 -08:00
asm-powerpc	ide: remove stale ide.h "configuration options"	2008-01-25 22:17:08 +01:00
asm-ppc	ppc: fix AT_VECTOR_SIZE on arch/ppc	2007-10-22 19:18:54 -07:00
asm-s390	[S390] do local_irq_restore while spinning in spin_lock_irqsave.	2008-01-26 14:11:31 +01:00
asm-sh	sh: Force __access_ok() to obey address space limit.	2008-01-11 13:18:16 +09:00
asm-sh64	sh: remove PTRACE_O_TRACESYSGOOD from asm/ptrace.h	2007-11-07 11:13:54 +09:00
asm-sparc	[SPARC32]: Silence sparc32 warnings on missing syscalls.	2007-12-14 10:59:50 -08:00
asm-sparc64	[SPARC64]: Implement pci_resource_to_user()	2007-12-26 19:33:46 -08:00
asm-um	uml: update address space affected by pud_clear	2007-11-14 18:45:37 -08:00
asm-v850	Add CONFIG_DEBUG_SG sg validation	2007-10-22 21:20:03 +02:00
asm-x86	sched: high-res preemption tick	2008-01-25 21:08:29 +01:00
asm-xtensa	xtensa: dma-mapping.h is using linux/scatterlist.h functions, so include it	2007-10-24 13:28:40 +02:00
crypto	[CRYPTO] api: Include sched.h for cond_resched in scatterwalk.h	2008-01-11 08:16:59 +11:00
keys	KEYS: Make request_key() and co fundamentally asynchronous	2007-10-17 08:42:57 -07:00
linux	block: cfq: make the io contect sharing lockless	2008-01-28 10:50:33 +01:00
math-emu
media	i2c: Constify client address data	2008-01-27 18:14:46 +01:00
mtd
net	IPoIB: improve IPv4/IPv6 to IB mcast mapping functions	2008-01-25 14:15:37 -08:00
pcmcia	[AVR32] pcmcia ioaddr_t should be 32 bits on AVR32	2007-11-15 13:47:19 +01:00
rdma	RDMA/cma: add support for rdma_migrate_id()	2008-01-25 14:15:32 -08:00
rxrpc
scsi	[SCSI] libsas: abstract STP task status into a function	2008-01-25 11:47:23 -06:00
sound	[ALSA] version 1.0.15	2007-11-20 20:16:43 +01:00
video	Make asm-x86/bootparam.h includable from userspace.	2007-10-23 15:49:47 +10:00
xen
Kbuild