linux-mm.kvack.org archive mirror
 help / color / mirror / Atom feed
* [PATCH 0/4] kvfree_rcu() and _LOCK_NESTING/_PREEMPT_RT
@ 2020-09-18 19:48 Uladzislau Rezki (Sony)
  2020-09-18 19:48 ` [PATCH 1/4] rcu/tree: Add a work to allocate pages from regular context Uladzislau Rezki (Sony)
                   ` (5 more replies)
  0 siblings, 6 replies; 76+ messages in thread
From: Uladzislau Rezki (Sony) @ 2020-09-18 19:48 UTC (permalink / raw)
  To: LKML, RCU, linux-mm, Andrew Morton, Paul E . McKenney
  Cc: Peter Zijlstra, Michal Hocko, Vlastimil Babka, Thomas Gleixner,
	Theodore Y . Ts'o, Joel Fernandes, Sebastian Andrzej Siewior,
	Uladzislau Rezki, Oleksiy Avramchenko

Hello, folk!

This is another iteration of fixing kvfree_rcu() issues related
to CONFIG_PROVE_RAW_LOCK_NESTING and CONFIG_PREEMPT_RT configs.

The first discussion is here https://lkml.org/lkml/2020/8/9/195.

- As an outcome of it, there was a proposal from Peter, instead of
using a speciall "lock-less" flag it is better to move lock-less
access to the pcplist to the separate function.

- To add a special worker thread that does prefetching of pages
if a per-cpu page cache is depleted(what is absolutely normal). 

As usual, thank you for paying attention to it and your help!

Uladzislau Rezki (Sony) (4):
  rcu/tree: Add a work to allocate pages from regular context
  mm: Add __rcu_alloc_page_lockless() func.
  rcu/tree: use __rcu_alloc_page_lockless() func.
  rcu/tree: Use schedule_delayed_work() instead of WQ_HIGHPRI queue

 include/linux/gfp.h |  1 +
 kernel/rcu/tree.c   | 90 ++++++++++++++++++++++++---------------------
 mm/page_alloc.c     | 82 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 132 insertions(+), 41 deletions(-)

-- 
2.20.1



^ permalink raw reply	[flat|nested] 76+ messages in thread

end of thread, other threads:[~2020-10-07 11:02 UTC | newest]

Thread overview: 76+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-09-18 19:48 [PATCH 0/4] kvfree_rcu() and _LOCK_NESTING/_PREEMPT_RT Uladzislau Rezki (Sony)
2020-09-18 19:48 ` [PATCH 1/4] rcu/tree: Add a work to allocate pages from regular context Uladzislau Rezki (Sony)
2020-09-18 19:48 ` [RFC-PATCH 2/4] mm: Add __rcu_alloc_page_lockless() func Uladzislau Rezki (Sony)
2020-09-21  7:47   ` Michal Hocko
2020-09-21 15:45     ` Paul E. McKenney
2020-09-21 16:03       ` Michal Hocko
2020-09-21 19:48         ` Uladzislau Rezki
2020-09-22  7:50           ` Michal Hocko
2020-09-22 13:12             ` Uladzislau Rezki
2020-09-22 15:35               ` Michal Hocko
2020-09-23 10:37               ` Mel Gorman
2020-09-23 15:41                 ` Paul E. McKenney
2020-09-23 23:22                   ` Mel Gorman
2020-09-24  8:16                     ` Uladzislau Rezki
2020-09-24 11:16                       ` Peter Zijlstra
2020-09-24 15:16                         ` Uladzislau Rezki
2020-09-24 11:19                       ` Peter Zijlstra
2020-09-24 15:21                         ` Uladzislau Rezki
2020-09-25  8:15                           ` Peter Zijlstra
2020-09-25 10:25                             ` Uladzislau Rezki
2020-09-24 15:38                         ` Paul E. McKenney
2020-09-25  8:26                           ` Peter Zijlstra
2020-09-26 14:37                             ` Paul E. McKenney
2020-09-25  8:05                       ` Michal Hocko
2020-09-25 15:31                         ` Uladzislau Rezki
2020-09-25 15:47                           ` Michal Hocko
2020-09-29 16:25                             ` Uladzislau Rezki
2020-09-30  9:27                               ` Michal Hocko
2020-09-30 12:35                                 ` Uladzislau Rezki
2020-09-30 12:44                                   ` Michal Hocko
2020-09-30 13:39                                     ` Uladzislau Rezki
2020-09-30 16:46                                       ` Michal Hocko
2020-09-30 20:36                                         ` Uladzislau Rezki
2020-09-30 15:25                             ` Joel Fernandes
2020-09-30 16:48                               ` Michal Hocko
2020-09-30 17:03                                 ` Joel Fernandes
2020-09-30 17:22                                   ` Michal Hocko
2020-09-30 17:48                                     ` Joel Fernandes
2020-09-25 16:17                           ` Mel Gorman
2020-09-25 17:57                             ` Uladzislau Rezki
2020-09-22 15:49             ` Paul E. McKenney
2020-09-22  3:35         ` Paul E. McKenney
2020-09-22  8:03           ` Michal Hocko
2020-09-22 15:46             ` Paul E. McKenney
2020-09-23 11:27               ` Uladzislau Rezki
2020-09-29 10:15   ` Vlastimil Babka
2020-09-29 22:07     ` Uladzislau Rezki
2020-09-30 10:35       ` Michal Hocko
2020-10-01 19:32         ` Uladzislau Rezki
2020-09-30 14:39       ` Vlastimil Babka
2020-09-30 15:37         ` Joel Fernandes
2020-10-01 19:26         ` Uladzislau Rezki
2020-10-02  7:11           ` Michal Hocko
2020-10-02  8:50             ` Mel Gorman
2020-10-02  9:05               ` Michal Hocko
2020-10-05 15:08                 ` Uladzislau Rezki
2020-10-05 15:41                   ` Michal Hocko
2020-10-06 22:25                     ` Uladzislau Rezki
2020-10-07 10:02                       ` Michal Hocko
2020-10-07 11:02                         ` Uladzislau Rezki
2020-10-02  9:07               ` Peter Zijlstra
2020-10-02  9:45                 ` Mel Gorman
2020-10-02  9:58                   ` Peter Zijlstra
2020-10-02 10:19                     ` Mel Gorman
2020-10-02 14:41                       ` Paul E. McKenney
2020-10-06 10:03                         ` Mel Gorman
2020-10-06 15:41                           ` Paul E. McKenney
2020-10-05 13:58             ` Uladzislau Rezki
2020-10-02  8:06           ` Mel Gorman
2020-10-05 14:12             ` Uladzislau Rezki
2020-09-18 19:48 ` [PATCH 3/4] rcu/tree: use " Uladzislau Rezki (Sony)
2020-09-18 19:48 ` [PATCH 4/4] rcu/tree: Use schedule_delayed_work() instead of WQ_HIGHPRI queue Uladzislau Rezki (Sony)
2020-09-20 15:06   ` Paul E. McKenney
2020-09-21 13:27     ` Uladzislau Rezki
2020-09-18 22:15 ` [PATCH 0/4] kvfree_rcu() and _LOCK_NESTING/_PREEMPT_RT Paul E. McKenney
2020-09-30 15:52 ` Joel Fernandes

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).