On Wed, Jul 03, 2013 at 08:41:24PM +0200, Peter Zijlstra wrote: > On Wed, Jul 03, 2013 at 03:21:39PM +0100, Mel Gorman wrote: > > > Note that the patch still leaves shared, file-backed in VM_EXEC vmas in > > place guessing that these are shared library pages. Migrating them are > > likely to be of major benefit as generally the expectation would be that > > these are read-shared between caches and that iTLB and iCache pressure is > > generally low. > > I'm failing to grasp.. we don't migrate them because migrating them would > likely be beneficial? > > Missing a negative somewhere?
Yes. Note that the patch does not migrate shared, file-backed within vmas marked VM_EXEC as these are generally shared library pages. Migrating such pages is not beneficial as there is an expectation they are read-shared between caches and iTLB and iCache pressure is generally low. -- Mel Gorman SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
