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| author | Avi Kivity <avi@redhat.com> | 2010-05-10 13:08:26 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-08-01 10:47:06 +0300 |
| commit | 0719837c0832a7b305e42327caa7d330462360ea (patch) | |
| tree | 73f574529aa588d5270da0a9cf048a65e863ba93 /samples | |
| parent | a8eeb04a44dd6dc4c8158953d9bae48849c9a188 (diff) | |
| download | lwn-0719837c0832a7b305e42327caa7d330462360ea.tar.gz lwn-0719837c0832a7b305e42327caa7d330462360ea.zip | |
KVM: Reduce atomic operations on vcpu->requests
Usually the vcpu->requests bitmap is sparse, so a test_and_clear_bit() for
each request generates a large number of unneeded atomics if a bit is set.
Replace with a separate test/clear sequence. This is safe since there is
no clear_bit() outside the vcpu thread.
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'samples')
0 files changed, 0 insertions, 0 deletions