On Mon, 20 Jul 2015, Chris Metcalf wrote: > On 07/18/2015 03:11 PM, Paul Gortmaker wrote: > >On Tue, Jul 7, 2015 at 1:03 PM, Eric B Munson<emunson@xxxxxxxxxx> wrote: > >>>The cost of faulting in all memory to be locked can be very high when > >>>working with large mappings. If only portions of the mapping will be > >>>used this can incur a high penalty for locking. > >>> > >>>Now that we have the new VMA flag for the locked but not present state, > >>>expose it as an mmap option like MAP_LOCKED -> VM_LOCKED. > >An automatic bisection on arch/tile leads to this commit: > > > >5a5656f2c9b61c74c15f9ef3fa2e6513b6c237bb is the first bad commit > >commit 5a5656f2c9b61c74c15f9ef3fa2e6513b6c237bb > >Author: Eric B Munson<emunson@xxxxxxxxxx> > >Date: Thu Jul 16 10:09:22 2015 +1000 > > > > mm: mmap: add mmap flag to request VM_LOCKONFAULT > > Eric, I'm happy to help with figuring out the tile issues. Thanks for the offer, I think I have is sorted in V4 (which I am checking one last time before I post). Eric
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