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Code Issues Releases Wiki Activity

mm/kmemleak: move set_track_prepare() outside raw_spinlocks 

set_track_prepare() will call __alloc_pages() which attempts to acquire
zone->lock(spinlocks), so move it outside object->lock(raw_spinlocks)
because it's not right to acquire spinlocks while holding raw_spinlocks in
RT mode.

Link: https://lkml.kernel.org/r/20231115082138.2649870-3-liushixin2@huawei.com
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Patrick Wang <patrick.wang.shcn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liu Shixin 2023-11-15 16:21:38 +08:00 committed by Andrew Morton
parent 4eff7d62ab
commit d63385a7d3
1 changed files with 3 additions and 1 deletions
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4
mm/kmemleak.c
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@ -1152,6 +1152,7 @@ EXPORT_SYMBOL_GPL(kmemleak_free_percpu);
void __ref kmemleak_update_trace(const void *ptr)
{
struct kmemleak_object *object;
depot_stack_handle_t trace_handle;
unsigned long flags;
pr_debug("%s(0x%px)\n", __func__, ptr);
@ -1168,8 +1169,9 @@ void __ref kmemleak_update_trace(const void *ptr)
return;
}
trace_handle = set_track_prepare();
raw_spin_lock_irqsave(&object->lock, flags);
object->trace_handle = set_track_prepare();
object->trace_handle = trace_handle;
raw_spin_unlock_irqrestore(&object->lock, flags);
put_object(object);