kernel_samsung_sm7125

jenna

Commit Graph

Author	SHA1	Message	Date
David S. Miller	4cfea5a7df	[SPARC64]: Fix atomic backoff limit. 4096 will not fit into the immediate field of a compare instruction, in fact it will end up being -4096 causing the check to fail every time and thus disabling backoff. Signed-off-by: David S. Miller <davem@davemloft.net>	17 years ago
David S. Miller	0aa031d9e0	[SPARC64]: Fix BACKOFF_SPIN on non-SMP. It can't be just empty, it has to at least branch back to 'label'. Signed-off-by: David S. Miller <davem@davemloft.net>	18 years ago
David S. Miller	24f287e412	[SPARC64]: Implement atomic backoff. When the cpu count is high and contention hits an atomic object, the processors can synchronize such that some cpus continually get knocked out and cannot complete the atomic update. So implement an exponential backoff when SMP. Signed-off-by: David S. Miller <davem@davemloft.net>	18 years ago

Author

SHA1

Message

Date

David S. Miller

4cfea5a7df

[SPARC64]: Fix atomic backoff limit.

4096 will not fit into the immediate field of a compare instruction,
in fact it will end up being -4096 causing the check to fail every
time and thus disabling backoff.

Signed-off-by: David S. Miller <davem@davemloft.net>

17 years ago

David S. Miller

0aa031d9e0

[SPARC64]: Fix BACKOFF_SPIN on non-SMP.

It can't be just empty, it has to at least branch
back to 'label'.

Signed-off-by: David S. Miller <davem@davemloft.net>

18 years ago

David S. Miller

24f287e412

[SPARC64]: Implement atomic backoff.

When the cpu count is high and contention hits an atomic object, the
processors can synchronize such that some cpus continually get knocked
out and cannot complete the atomic update.

So implement an exponential backoff when SMP.

Signed-off-by: David S. Miller <davem@davemloft.net>

18 years ago

3 Commits (424450c1dbe72b6e2637e91108417d7d9580c4c3)