WSL2-Linux-Kernel/include
Nick Piggin 612d6c19db [PATCH] radix-tree: direct data
The ability to have height 0 radix trees (a direct pointer to the data item
rather than going through a full node->slot) quietly disappeared with
old-2.6-bkcvs commit ffee171812d51652f9ba284302d9e5c5cc14bdfd.  On 64-bit
machines this causes nearly 600 bytes to be used for every <= 4K file in
pagecache.

Re-introduce this feature, root tags stored in spare ->gfp_mask bits.

Simplify radix_tree_delete's complex tag clearing arrangement (which would
become even more complex) by just falling back to tag clearing functions
(the pagecache radix-tree never uses this path anyway, so the icache
savings will mean it's actually a speedup).

On my 4GB G5, this saves 8MB RAM per kernel kernel source+object tree in
pagecache.

Pagecache lookup, insertion, and removal speed for small files will also be
improved.

This makes RCU radix tree harder, but it's worth it.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-23 07:42:49 -07:00
..
acpi [PATCH] Unify pxm_to_node() and node_to_pxm() 2006-06-23 07:42:48 -07:00
asm-alpha [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use 2006-06-22 15:05:58 -07:00
asm-arm Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2006-06-22 22:46:28 -07:00
asm-arm26 Remove unneeded _syscallX macros from user view in asm-*/unistd.h 2006-04-29 01:51:47 +01:00
asm-cris Remove unneeded _syscallX macros from user view in asm-*/unistd.h 2006-04-29 01:51:47 +01:00
asm-frv Remove unneeded _syscallX macros from user view in asm-*/unistd.h 2006-04-29 01:51:47 +01:00
asm-generic [PATCH] squash duplicate page_to_pfn and pfn_to_page 2006-06-23 07:42:47 -07:00
asm-h8300 Remove unneeded _syscallX macros from user view in asm-*/unistd.h 2006-04-29 01:51:47 +01:00
asm-i386 Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 2006-06-22 15:07:59 -07:00
asm-ia64 Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 2006-06-22 15:07:59 -07:00
asm-m32r [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use 2006-06-22 15:05:58 -07:00
asm-m68k Remove unneeded _syscallX macros from user view in asm-*/unistd.h 2006-04-29 01:51:47 +01:00
asm-m68knommu Remove unneeded _syscallX macros from user view in asm-*/unistd.h 2006-04-29 01:51:47 +01:00
asm-mips [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use 2006-06-22 15:05:58 -07:00
asm-parisc Remove unneeded _syscallX macros from user view in asm-*/unistd.h 2006-04-29 01:51:47 +01:00
asm-powerpc Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
asm-ppc Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
asm-s390 [PATCH] s390: add __raw_writeq required by __iowrite64_copy 2006-06-20 19:55:53 -07:00
asm-sh Remove unneeded _syscallX macros from user view in asm-*/unistd.h 2006-04-29 01:51:47 +01:00
asm-sh64 Remove unneeded _syscallX macros from user view in asm-*/unistd.h 2006-04-29 01:51:47 +01:00
asm-sparc Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6 2006-06-20 17:39:28 -07:00
asm-sparc64 [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use 2006-06-22 15:05:58 -07:00
asm-um Merge git://git.infradead.org/hdrcleanup-2.6 2006-06-20 15:10:08 -07:00
asm-v850 Remove unneeded _syscallX macros from user view in asm-*/unistd.h 2006-04-29 01:51:47 +01:00
asm-x86_64 [PATCH] Unify pxm_to_node() and node_to_pxm() 2006-06-23 07:42:48 -07:00
asm-xtensa [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use 2006-06-22 15:05:58 -07:00
keys
linux [PATCH] radix-tree: direct data 2006-06-23 07:42:49 -07:00
math-emu
media Revert include/media changes: Mauro says those ioctls are only used in-kernel(!) 2006-05-06 19:47:57 +01:00
mtd Merge git://git.infradead.org/hdrcleanup-2.6 2006-06-20 15:10:08 -07:00
net Merge branch 'master' into upstream 2006-06-22 22:51:46 -04:00
pcmcia Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
rdma IB/uverbs: Don't serialize with ib_uverbs_idr_mutex 2006-06-17 20:44:49 -07:00
rxrpc
scsi Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2006-06-21 11:18:25 -07:00
sound [ALSA] version 1.0.12rc1 2006-06-22 21:35:11 +02:00
video Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00