On Fri, 2015-09-25 at 14:46 +0000, David Laight wrote: > From: Scott Wood > > Sent: 24 September 2015 21:14 > > > Isn't this a more general problem? > > > > > > If there are multiple remap requests for the same physical page > > > shouldn't the kernel be just increasing a reference count somewhere > > > and returning address in the same virtual page? > > > This should probably happen regardless of the address. > > > I presume it must be done for cacheable mappings. > > > > Why would you assume that? > > Because 'really horrid (tm)' things happen on some cache > architectures if you map the same physical address to > multiple virtual addresses.
PPC is not such an architecture. -Scott -- 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/
