Files
android_kernel_xiaomi_sm8450/arch/s390/mm
David Hildenbrand af4bf6c3d9 s390/mm: optimize locking without huge pages in gmap_pmd_op_walk()
Right now we temporarily take the page table lock in
gmap_pmd_op_walk() even though we know we won't need it (if we can
never have 1mb pages mapped into the gmap).

Let's make this a special case, so gmap_protect_range() and
gmap_sync_dirty_log_pmd() will not take the lock when huge pages are
not allowed.

gmap_protect_range() is called quite frequently for managing shadow
page tables in vSIE environments.

Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Message-Id: <20180806155407.15252-1-david@redhat.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
2018-10-01 08:52:24 +02:00
..
2018-04-13 17:10:27 -07:00