* [patch] mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()
@ 2017-04-06 20:16 David Rientjes
2017-04-07 8:00 ` Michal Hocko
2017-04-10 14:19 ` Johannes Weiner
0 siblings, 2 replies; 3+ messages in thread
From: David Rientjes @ 2017-04-06 20:16 UTC (permalink / raw)
To: Andrew Morton
Cc: Johannes Weiner, Vladimir Davydov, KAMEZAWA Hiroyuki,
linux-kernel, linux-mm
We got need_resched() warnings in swap_cgroup_swapoff() because
swap_cgroup_ctrl[type].length is particularly large.
Reschedule when needed.
Signed-off-by: David Rientjes <rientjes@google.com>
---
mm/swap_cgroup.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/swap_cgroup.c b/mm/swap_cgroup.c
--- a/mm/swap_cgroup.c
+++ b/mm/swap_cgroup.c
@@ -201,6 +201,8 @@ void swap_cgroup_swapoff(int type)
struct page *page = map[i];
if (page)
__free_page(page);
+ if (!(i % SWAP_CLUSTER_MAX))
+ cond_resched();
}
vfree(map);
}
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [patch] mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()
2017-04-06 20:16 [patch] mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff() David Rientjes
@ 2017-04-07 8:00 ` Michal Hocko
2017-04-10 14:19 ` Johannes Weiner
1 sibling, 0 replies; 3+ messages in thread
From: Michal Hocko @ 2017-04-07 8:00 UTC (permalink / raw)
To: David Rientjes
Cc: Andrew Morton, Johannes Weiner, Vladimir Davydov,
KAMEZAWA Hiroyuki, linux-kernel, linux-mm
On Thu 06-04-17 13:16:24, David Rientjes wrote:
> We got need_resched() warnings in swap_cgroup_swapoff() because
> swap_cgroup_ctrl[type].length is particularly large.
>
> Reschedule when needed.
>
> Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
> ---
> mm/swap_cgroup.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/mm/swap_cgroup.c b/mm/swap_cgroup.c
> --- a/mm/swap_cgroup.c
> +++ b/mm/swap_cgroup.c
> @@ -201,6 +201,8 @@ void swap_cgroup_swapoff(int type)
> struct page *page = map[i];
> if (page)
> __free_page(page);
> + if (!(i % SWAP_CLUSTER_MAX))
> + cond_resched();
> }
> vfree(map);
> }
>
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
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> see: http://www.linux-mm.org/ .
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--
Michal Hocko
SUSE Labs
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [patch] mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff()
2017-04-06 20:16 [patch] mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff() David Rientjes
2017-04-07 8:00 ` Michal Hocko
@ 2017-04-10 14:19 ` Johannes Weiner
1 sibling, 0 replies; 3+ messages in thread
From: Johannes Weiner @ 2017-04-10 14:19 UTC (permalink / raw)
To: David Rientjes
Cc: Andrew Morton, Vladimir Davydov, KAMEZAWA Hiroyuki, linux-kernel,
linux-mm
On Thu, Apr 06, 2017 at 01:16:24PM -0700, David Rientjes wrote:
> We got need_resched() warnings in swap_cgroup_swapoff() because
> swap_cgroup_ctrl[type].length is particularly large.
>
> Reschedule when needed.
>
> Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2017-04-06 20:16 [patch] mm, swap_cgroup: reschedule when neeed in swap_cgroup_swapoff() David Rientjes
2017-04-07 8:00 ` Michal Hocko
2017-04-10 14:19 ` Johannes Weiner
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