Re: [PATCH 2/2] mm: adds NOSIGBUS extension for out-of-band shmem read
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: 2021-06-03 19:16:15
Also in:
linux-fsdevel, linux-mm, lkml
On Thu, Jun 3, 2021 at 12:12 PM Linus Torvalds [off-list ref] wrote:
Yeah, if that's sufficient, then that original patch should just work as-is.
To clarify: it obviously needs the VM_xyz flags things, but the
VM_SHARED check in do_anonymous_page() is fine, and the whole issue
with VM_MAYWRITE is entirely moot.
MAP_PRIVATE works fine with zero pages even when writable - they get
COW'ed properly, of course.
Linus