Re: [PATCH V4 5/6] mm: mmap: Add mmap flag to request VM_LOCKONFAULT
From: Kirill A. Shutemov <hidden>
Date: 2015-07-22 11:26:07
Also in:
linux-api, linux-arch, linux-mips, linux-mm, linuxppc-dev, lkml, sparclinux
On Tue, Jul 21, 2015 at 03:59:40PM -0400, Eric B Munson 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.
What is advantage over mmap() + mlock(MLOCK_ONFAULT)? -- Kirill A. Shutemov