From: Mike Galbraith <efault@gmx.de>
To: Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>
Cc: linux-rt-users@vger.kernel.org,
Mel Gorman <mgorman@techsingularity.net>,
Vlastimil Babka <vbabka@suse.cz>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: [patch] mm/slub: Replace do_slab_free() local_lock_irqsave/restore() calls in PREEMPT_RT scope
Date: Fri, 09 Jul 2021 07:20:48 +0200 [thread overview]
Message-ID: <b9b2dbb062bd25d9f6c0b918c3c834bc6964c2d6.camel@gmx.de> (raw)
In-Reply-To: <87tul5p2fa.ffs@nanos.tec.linutronix.de>
IRQ affecting local lock operations are intended for dual RT/!RT scope,
only affect IRQs in !RT scope. Replace misplaced do_slab_free() calls
with plain local_lock()/local_unlock(). Purely cosmetic.
Signed-off-by: Mike Galbraith <efault@gmx.de>
---
mm/slub.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3362,13 +3362,12 @@ static __always_inline void do_slab_free
* we need to take the local_lock. We shouldn't simply defer to
* __slab_free() as that wouldn't use the cpu freelist at all.
*/
- unsigned long flags;
void **freelist;
- local_lock_irqsave(&s->cpu_slab->lock, flags);
+ local_lock(&s->cpu_slab->lock);
c = this_cpu_ptr(s->cpu_slab);
if (unlikely(page != c->page)) {
- local_unlock_irqrestore(&s->cpu_slab->lock, flags);
+ local_unlock(&s->cpu_slab->lock);
goto redo;
}
tid = c->tid;
@@ -3378,7 +3377,7 @@ static __always_inline void do_slab_free
c->freelist = head;
c->tid = next_tid(tid);
- local_unlock_irqrestore(&s->cpu_slab->lock, flags);
+ local_unlock(&s->cpu_slab->lock);
#endif
stat(s, FREE_FASTPATH);
} else
next prev parent reply other threads:[~2021-07-09 5:20 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-08 9:42 [ANNOUNCE] v5.13-rt1 Thomas Gleixner
2021-07-09 5:20 ` [patch] mm/slub: Fix kmem_cache_alloc_bulk() error path Mike Galbraith
2021-07-09 5:20 ` Mike Galbraith [this message]
2021-07-09 5:21 ` [rfc/patch] mm/slub: restore/expand unfreeze_partials() local exclusion scope Mike Galbraith
2021-07-09 5:25 ` Mike Galbraith
2021-07-09 19:28 ` Thomas Gleixner
2021-07-10 1:12 ` Mike Galbraith
2021-07-15 16:34 ` Mike Galbraith
2021-07-17 14:58 ` [patch] v2 " Mike Galbraith
2021-07-18 7:58 ` Vlastimil Babka
2021-07-18 8:11 ` Mike Galbraith
2021-07-18 15:43 ` Mike Galbraith
2021-07-18 21:19 ` Vlastimil Babka
2021-07-19 4:01 ` Mike Galbraith
2021-07-19 13:15 ` Mike Galbraith
2021-07-20 2:46 ` kernel test robot
2021-07-20 8:56 ` [rfc/patch] " Vlastimil Babka
2021-07-20 11:26 ` Mike Galbraith
2021-07-21 4:56 ` Mike Galbraith
2021-07-21 8:44 ` Vlastimil Babka
2021-07-21 9:33 ` Mike Galbraith
2021-07-23 22:39 ` Vlastimil Babka
2021-07-24 2:25 ` Mike Galbraith
2021-07-25 14:09 ` Mike Galbraith
2021-07-25 14:16 ` Vlastimil Babka
2021-07-25 15:02 ` Mike Galbraith
2021-07-25 16:27 ` Vlastimil Babka
2021-07-25 19:12 ` Vlastimil Babka
2021-07-25 19:34 ` Vlastimil Babka
2021-07-26 10:04 ` Mike Galbraith
2021-07-26 17:00 ` Mike Galbraith
2021-07-26 21:26 ` Vlastimil Babka
2021-07-27 4:09 ` Mike Galbraith
2021-07-28 16:59 ` Vlastimil Babka
2021-07-29 4:51 ` Mike Galbraith
2021-07-29 9:51 ` Vlastimil Babka
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