[PATCH -next 0/2] tasklist_lock vs get/set priority syscalls

[Davidlohr Bueso <dave@stgolabs.net>]

Hi,

This is a (late) update on trying to reduce some of the scope of the tasklist_lock
for get/setpriority(2) as well as the block io equivalent. This version addresses
Oleg's previous concerns and incorporates his feedback.

Changes from v1:
https://lore.kernel.org/lkml/20200512000353.23653-1-dave@stgolabs.net/

 - only take the lock for PGID cases.
 - drop bogus PF_EXITING checks (and live with the small exit race).
 - add patch for IOPRIO_WHO_PGRP.

Please consider for v5.10.

Thanks!

Davidlohr Bueso (2):
  kernel/sys: only take tasklist_lock for get/setpriority(PRIO_PGRP)
  block: fix ioprio_get/set(IOPRIO_WHO_PGRP) vs setuid(2)

 block/ioprio.c |  4 ++++
 kernel/sys.c   | 16 ++++++++--------
 2 files changed, 12 insertions(+), 8 deletions(-)

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2.26.2