On Fri, Jul 26, 2013 at 07:27:23AM -0700, Davidlohr Bueso wrote: > This patchset attempts to reduce the amount of contention we impose > on the hugetlb_instantiation_mutex by replacing the global mutex with > a table of mutexes, selected based on a hash. The original discussion can > be found here: http://lkml.org/lkml/2013/7/12/428 Hello, Davidlohr. I recently sent a patchset which remove the hugetlb_instantiation_mutex entirely ('mm, hugetlb: remove a hugetlb_instantiation_mutex'). This patchset can be found here: https://lkml.org/lkml/2013/7/29/54 If possible, could you review it and test it whether your problem is disappered with it or not? Thanks. > > Patch 1: Allows the file region tracking list to be serialized by its own rwsem. > This is necessary because the next patch allows concurrent hugepage fault paths, > getting rid of the hugetlb_instantiation_mutex - which protects chains of struct > file_regionin inode->i_mapping->private_list (VM_MAYSHARE) or vma_resv_map(vma)->regions > (!VM_MAYSHARE). > > Patch 2: From David Gibson, for some reason never made it into the kernel. > Further cleanups and enhancements from Anton Blanchard and myself. > Details of how the hash key is selected is in the patch. > > Davidlohr Bueso (2): > hugepage: protect file regions with rwsem > hugepage: allow parallelization of the hugepage fault path > > mm/hugetlb.c | 134 ++++++++++++++++++++++++++++++++++++++++++++++------------- > 1 file changed, 106 insertions(+), 28 deletions(-) > > -- > 1.7.11.7 > > -- > 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> -- 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>