On Tue, Nov 17, 2015 at 04:42:49PM +0530, Vineet Gupta wrote: > On Saturday 07 November 2015 04:22 PM, Noam Camus wrote: > > From: Tal Zilcer <t...@ezchip.com> > > > > In SMT system like we have the generic "sync" is not working with > > HW threads. The replacement is "schd.rw" instruction that is served > > as cpu barrier for HW threads. > > As discussed in v2 of this patch, SYNC or some such in __switch_to is > completely > superfluous. We don't need this patch, you may instead wanna submit a patch > which > removes the sync. Also please do that in assembler version of this file as > well !
Do test it though; as is ARC-SMP seems to have a _lot_ of superfluous barriers many of which have no explanation yet (I'm thinking of those extra smp_mb()s in the lock primitives). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
