lkml.org 
[lkml]   [2020]   [Sep]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 3/4] mmap locking API: Don't check locking if the mm isn't live yet
On Tue, Sep 29, 2020 at 06:20:00PM -0700, Jann Horn wrote:
> In preparation for adding a mmap_assert_locked() check in
> __get_user_pages(), teach the mmap_assert_*locked() helpers that it's fine
> to operate on an mm without locking in the middle of execve() as long as
> it hasn't been installed on a process yet.

I'm happy to see lockdep being added here, but can you elaborate on
why add this mmap_locked_required instead of obtaining the lock in the
execv path?

Jason

\
 
 \ /
  Last update: 2020-09-30 14:30    [W:0.095 / U:0.404 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site