Andi Kleen
3cfc348bf9
[PATCH] x86: Add portable getcpu call ...
For NUMA optimization and some other algorithms it is useful to have a fast
to get the current CPU and node numbers in user space.
x86-64 added a fast way to do this in a vsyscall. This adds a generic
syscall for other architectures to make it a generic portable facility.
I expect some of them will also implement it as a faster vsyscall.
The cache is an optimization for the x86-64 vsyscall optimization. Since
what the syscall returns is an approximation anyways and user space
often wants very fast results it can be cached for some time. The norma
methods to get this information in user space are relatively slow
The vsyscall is in a better position to manage the cache because it has direct
access to a fast time stamp (jiffies). For the generic syscall optimization
it doesn't help much, but enforce a valid argument to keep programs
portable
I only added an i386 syscall entry for now. Other architectures can follow
as needed.
AK: Also added some cleanups from Andrew Morton
Signed-off-by: Andi Kleen <ak@suse.de>
2006-09-26 10:52:28 +02:00
Pull acpi_os_allocate into test branch
2006-07-10 02:39:47 -04:00
[libata] No need for all those arch libata-portmap.h headers
2006-09-25 15:33:09 -04:00
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
2006-09-24 22:05:59 +01:00
Remove ARM26 header export.
2006-09-21 08:54:44 +01:00
Clean up exported headers on CRIS
2006-09-21 09:33:55 +01:00
[libata] No need for all those arch libata-portmap.h headers
2006-09-25 15:33:09 -04:00
Merge branch 'master' into upstream
2006-09-24 01:52:47 -04:00
Fix H8300 exported headers.
2006-09-21 08:51:43 +01:00
[PATCH] x86: Add portable getcpu call
2006-09-26 10:52:28 +02:00
[PATCH] cpu to node relationship fixup: map cpu to node
2006-09-25 17:38:36 -07:00
Fix 'make headers_check' on m32r
2006-09-21 08:41:35 +01:00
[PATCH] Fix 'make headers_check' on ia64
2006-09-19 07:59:59 -07:00
Fix m68knommu exported headers
2006-09-21 08:50:36 +01:00
[PATCH] headers_check: fix userspace build of asm-mips/page.h
2006-09-13 07:32:16 -07:00
[PATCH] headers_check: Clean up asm-parisc/page.h for user headers
2006-09-19 07:59:59 -07:00
[libata] No need for all those arch libata-portmap.h headers
2006-09-25 15:33:09 -04:00
[PATCH] #elif that should've been #elif defined
2006-09-23 11:34:43 -07:00
[S390] Unexport <asm/z90crypt.h>, export <asm/zcrypt.h> in its place.
2006-09-24 22:07:25 +01:00
Fix 'make headers_check' on sh
2006-09-21 08:36:50 +01:00
Fix 'make headers_check' on sh64
2006-09-21 08:37:10 +01:00
[libata] No need for all those arch libata-portmap.h headers
2006-09-25 15:33:09 -04:00
[libata] No need for all those arch libata-portmap.h headers
2006-09-25 15:33:09 -04:00
Remove UML header export
2006-09-21 08:55:28 +01:00
Fix v850 exported headers
2006-09-21 09:05:25 +01:00
[PATCH] Add the vgetcpu vsyscall
2006-09-26 10:52:28 +02:00
[PATCH] remove set_wmb - arch removal
2006-07-14 21:56:14 -07:00
[CRYPTO] digest: Added user API for new hash type
2006-09-21 11:46:17 +10:00
[PATCH] keys: discard the contents of a key on revocation
2006-06-26 09:58:18 -07:00
[PATCH] x86: Add portable getcpu call
2006-09-26 10:52:28 +02:00
V4L/DVB (4605): Fixes an issue with V4L1 and make headers-install
2006-09-10 13:45:55 -03:00
Merge git://git.infradead.org/~dwmw2/hdroneline
2006-09-22 12:56:22 -07:00
[NetLabel]: rework the Netlink attribute handling (part 1)
2006-09-25 15:56:09 -07:00
IB/sa: fix ib_sa_selector names
2006-09-22 15:22:55 -07:00
[PATCH] SCSI gfp_t annotations
2006-09-24 20:07:49 -07:00
[ALSA] ak4xxx - Remove bogus IPGA controls
2006-09-23 10:46:55 +02:00
[HEADERS] One line per header in Kbuild files to reduce conflicts
2006-09-19 12:43:58 +01:00
[HEADERS] One line per header in Kbuild files to reduce conflicts
2006-09-19 12:43:58 +01:00
3cfc348bf9