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| author |   Eric Dumazet <dada1@cosmosbay.com> | 2007-05-02 19:27:11 +0200 |
|---|---|---|
| committer |   Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:11 +0200 |
| commit | c8118c6c07f2edfd697aaa0b93e08c3b65a5a675 (patch) | |
| tree | efba31a24e3f2c629f727d53767fb18aaab915e2 /arch/x86_64/mm | |
| parent | [PATCH] x86-64: fix vtime() vsyscall (diff) | |
| download | linux-dev-c8118c6c07f2edfd697aaa0b93e08c3b65a5a675.tar.xz linux-dev-c8118c6c07f2edfd697aaa0b93e08c3b65a5a675.zip | |
[PATCH] x86-64: vsyscall_gtod_data diet and vgettimeofday() fix
Current vsyscall_gtod_data is large (3 or 4 cache lines dirtied at timer
interrupt). We can shrink it to exactly 64 bytes (1 cache line on AMD64)
Instead of copying a whole struct clocksource, we copy only needed fields.
I deleted an unused field : offset_base
This patch fixes one oddity in vgettimeofday(): It can returns a timeval with
tv_usec = 1000000. Maybe not a bug, but why not doing the right thing ?
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/x86_64/mm')
0 files changed, 0 insertions, 0 deletions