* [merged] kfence-use-task_idle-when-awaiting-allocation.patch removed from -mm tree
@ 2021-06-07 20:41 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2021-06-07 20:41 UTC (permalink / raw)
To: David.Laight, dvyukov, elver, glider, hdanton, mgorman,
mm-commits, stable
The patch titled
Subject: kfence: use TASK_IDLE when awaiting allocation
has been removed from the -mm tree. Its filename was
kfence-use-task_idle-when-awaiting-allocation.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Marco Elver <elver@google.com>
Subject: kfence: use TASK_IDLE when awaiting allocation
Since wait_event() uses TASK_UNINTERRUPTIBLE by default, waiting for an
allocation counts towards load. However, for KFENCE, this does not make
any sense, since there is no busy work we're awaiting.
Instead, use TASK_IDLE via wait_event_idle() to not count towards load.
BugLink: https://bugzilla.suse.com/show_bug.cgi?id=1185565
Link: https://lkml.kernel.org/r/20210521083209.3740269-1-elver@google.com
Fixes: 407f1d8c1b5f ("kfence: await for allocation using wait_event")
Signed-off-by: Marco Elver <elver@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: David Laight <David.Laight@ACULAB.COM>
Cc: Hillf Danton <hdanton@sina.com>
Cc: <stable@vger.kernel.org> [5.12+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/kfence/core.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/mm/kfence/core.c~kfence-use-task_idle-when-awaiting-allocation
+++ a/mm/kfence/core.c
@@ -627,10 +627,10 @@ static void toggle_allocation_gate(struc
* During low activity with no allocations we might wait a
* while; let's avoid the hung task warning.
*/
- wait_event_timeout(allocation_wait, atomic_read(&kfence_allocation_gate),
- sysctl_hung_task_timeout_secs * HZ / 2);
+ wait_event_idle_timeout(allocation_wait, atomic_read(&kfence_allocation_gate),
+ sysctl_hung_task_timeout_secs * HZ / 2);
} else {
- wait_event(allocation_wait, atomic_read(&kfence_allocation_gate));
+ wait_event_idle(allocation_wait, atomic_read(&kfence_allocation_gate));
}
/* Disable static key and reset timer. */
_
Patches currently in -mm which might be from elver@google.com are
mm-slub-change-run-time-assertion-in-kmalloc_index-to-compile-time-fix.patch
printk-introduce-dump_stack_lvl-fix.patch
kfence-unconditionally-use-unbound-work-queue.patch
kcov-add-__no_sanitize_coverage-to-fix-noinstr-for-all-architectures.patch
kcov-add-__no_sanitize_coverage-to-fix-noinstr-for-all-architectures-v2.patch
kcov-add-__no_sanitize_coverage-to-fix-noinstr-for-all-architectures-v3.patch
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2021-06-07 20:41 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-06-07 20:41 [merged] kfence-use-task_idle-when-awaiting-allocation.patch removed from -mm tree akpm
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.