linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2008-03-19	[SPARC64]: Fix atomic backoff limit.	David S. Miller	1	-1/+2
	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>
2007-10-27	[SPARC64]: Fix BACKOFF_SPIN on non-SMP.	David S. Miller	1	-1/+3
	It can't be just empty, it has to at least branch back to 'label'. Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-17	[SPARC64]: Implement atomic backoff.	David S. Miller	1	-0/+28
	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>