On 2015-07-21 11:37 AM, Eric B Munson wrote: > 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). Not quite sorted yet. Seems parisc fails on v4. It updated the number of syscalls but did not update syscall_table.S causing: arch/parisc/kernel/syscall_table.S:444: Error: size of syscall table does not fit value of __NR_Linux_syscalls http://kisskb.ellerman.id.au/kisskb/buildresult/12468884/ Paul. -- > Eric > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>