On Thu, Mar 12, 2015 at 04:24:10PM +0100, Torsten Duwe wrote:
But generally, which platforms would benefit most from this change?
In theory, the more cpus the platform has, the more serious the thundering
herd problem is. So the latest platforms which has more cpus would benefit
most.
Thanks,
On Fri, 2015-03-13 at 14:09 +0800, Kevin Hao wrote:
On Thu, Mar 12, 2015 at 04:24:10PM +0100, Torsten Duwe wrote:
But generally, which platforms would benefit most from this change?
In theory, the more cpus the platform has, the more serious the thundering
herd problem is. So the latest
On Thu, 2015-03-12 at 22:13 +1100, Benjamin Herrenschmidt wrote:
On Thu, 2015-03-12 at 18:55 +0800, Kevin Hao wrote:
I know Torsten Duwe has tried to add the ticket spinlock for powerpc
one year ago [1]. But it make no progress due to the conflict between
PPC_SPLPAR and lockref. We still
On Thu, Mar 12, 2015 at 10:13:27PM +1100, Benjamin Herrenschmidt wrote:
I would do the ifdef'ing differently, something like
CONFIG_PPC_HAS_LOCK_OWNER
CONFIG_PPC_TICKET_LOCKS depends on !PPC_HAS_LOCK_OWNER
and use these two in the code... with SPLPAR select'ing HAS_LOCK_OWNER
OK, will
On Fri, 2015-03-13 at 18:09 +1100, Michael Ellerman wrote:
On Thu, 2015-03-12 at 22:13 +1100, Benjamin Herrenschmidt wrote:
On Thu, 2015-03-12 at 18:55 +0800, Kevin Hao wrote:
I know Torsten Duwe has tried to add the ticket spinlock for powerpc
one year ago [1]. But it make no progress
I know Torsten Duwe has tried to add the ticket spinlock for powerpc
one year ago [1]. But it make no progress due to the conflict between
PPC_SPLPAR and lockref. We still don't find a better way to handle
this. But instead of waiting forever for a perfect solution, can't we
just use the ticket
On Thu, Mar 12, 2015 at 10:13:27PM +1100, Benjamin Herrenschmidt wrote:
On Thu, 2015-03-12 at 18:55 +0800, Kevin Hao wrote:
I know Torsten Duwe has tried to add the ticket spinlock for powerpc
one year ago [1]. But it make no progress due to the conflict between
OMG, time flies.
On Thu, 2015-03-12 at 18:55 +0800, Kevin Hao wrote:
I know Torsten Duwe has tried to add the ticket spinlock for powerpc
one year ago [1]. But it make no progress due to the conflict between
PPC_SPLPAR and lockref. We still don't find a better way to handle
this. But instead of waiting forever
