On Wed, 2014-07-16 at 16:00 +1000, NeilBrown wrote:
> On Wed, 16 Jul 2014 11:24:58 +0800 Ian Kent wrote:
>
> > On Thu, 2014-07-10 at 09:41 +1000, NeilBrown wrote:
> > > autofs4 currently doesn't support RCU-walk - it immediately
> > > aborts any attempt at RCU-walk to force REF-walk for path name
On Wed, 16 Jul 2014 11:24:58 +0800 Ian Kent wrote:
> On Thu, 2014-07-10 at 09:41 +1000, NeilBrown wrote:
> > autofs4 currently doesn't support RCU-walk - it immediately
> > aborts any attempt at RCU-walk to force REF-walk for path name
> > lookup.
>
> As discussed I don't have time to properly t
On Thu, 2014-07-10 at 09:41 +1000, NeilBrown wrote:
> autofs4 currently doesn't support RCU-walk - it immediately
> aborts any attempt at RCU-walk to force REF-walk for path name
> lookup.
As discussed I don't have time to properly test these just now but I'll
do my best to review the patches and
On Thu, 2014-07-10 at 18:25 +1000, NeilBrown wrote:
> On Thu, 10 Jul 2014 15:43:40 +0800 Ian Kent wrote:
>
> > On Thu, 2014-07-10 at 09:41 +1000, NeilBrown wrote:
> > > autofs4 currently doesn't support RCU-walk - it immediately
> > > aborts any attempt at RCU-walk to force REF-walk for path name
On Thu, 10 Jul 2014 15:43:40 +0800 Ian Kent wrote:
> On Thu, 2014-07-10 at 09:41 +1000, NeilBrown wrote:
> > autofs4 currently doesn't support RCU-walk - it immediately
> > aborts any attempt at RCU-walk to force REF-walk for path name
> > lookup.
> >
> > This can cause a significant performance
On Thu, 2014-07-10 at 15:43 +0800, Ian Kent wrote:
>
> Thanks for your effort Bruce,
Oh boy, where did that come from, sorry Neil, ;)
> Ian
>
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On Thu, 2014-07-10 at 09:41 +1000, NeilBrown wrote:
> autofs4 currently doesn't support RCU-walk - it immediately
> aborts any attempt at RCU-walk to force REF-walk for path name
> lookup.
>
> This can cause a significant performance impact on multi-core
> systems.
> I have a client with a test ca
autofs4 currently doesn't support RCU-walk - it immediately
aborts any attempt at RCU-walk to force REF-walk for path name
lookup.
This can cause a significant performance impact on multi-core
systems.
I have a client with a test case which spends >80% of its time
waiting for spinlocks with a "mak
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