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| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2010-02-26 22:37:40 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-02-26 22:37:31 +0100 |
| commit | 59b697874529f5c3cbcaf5816b3d6c584af521e8 (patch) | |
| tree | c395952c2a0bb9a3027a37a30dd37cc93b1a7c3f /arch/s390/kvm/sigp.c | |
| parent | 8387c736fcbaec17890b8d075ee4f4623518b54a (diff) | |
[S390] spinlock: check virtual cpu running status
This patch introduces a new function that checks the running status
of a cpu in a hypervisor. This status is not virtualized, so the check
is only correct if running in an LPAR. On acquiring a spinlock, if the
cpu holding the lock is scheduled by the hypervisor, we do a busy wait
on the lock. If it is not scheduled, we yield over to that cpu.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/sigp.c')
0 files changed, 0 insertions, 0 deletions