[PATCH -next v2 0/2] kernel/sys: reduce tasklist_lock usage get/set priorities

[Davidlohr Bueso]

Hi,

The following are two patches that deal with removing the tasklist_lock entirely in
getpriority(2), and reducing the scope of it in setpriority(2). This also aligns
somewhat to what we already do with io priorities - although there both set and get
rely entirely on rcu.

Details in the changelog but this passes ltp tests. Please consider for v5.8.

Changes from v1:
 - split get and set into two patches.
 - improved changelog.

Thanks!

Davidlohr Bueso (2):
  kernel/sys: only rely on rcu for getpriority(2)
  kernel/sys: do not grab tasklist_lock for sys_setpriority(PRIO_PROCESS)

 kernel/sys.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

-- 
2.26.1