* [PATCH] nilfs2: Add missing set_freezable() for freezable kthread
@ 2023-12-17 13:50 Kevin Hao
2023-12-17 15:49 ` Ryusuke Konishi
0 siblings, 1 reply; 3+ messages in thread
From: Kevin Hao @ 2023-12-17 13:50 UTC (permalink / raw)
To: Ryusuke Konishi; +Cc: linux-nilfs, Rafael J. Wysocki, Pavel Machek
The kernel thread function nilfs_segctor_thread() invokes
the try_to_freeze() in its loop. But all the kernel threads are
non-freezable by default. So if we want to make a kernel thread to be
freezable, we have to invoke set_freezable() explicitly.
Signed-off-by: Kevin Hao <haokexin@gmail.com>
---
fs/nilfs2/segment.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 52995838f2de..2590a0860eab 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -2588,6 +2588,7 @@ static int nilfs_segctor_thread(void *arg)
"segctord starting. Construction interval = %lu seconds, CP frequency < %lu seconds",
sci->sc_interval / HZ, sci->sc_mjcp_freq / HZ);
+ set_freezable();
spin_lock(&sci->sc_state_lock);
loop:
for (;;) {
--
2.39.2
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] nilfs2: Add missing set_freezable() for freezable kthread
2023-12-17 13:50 [PATCH] nilfs2: Add missing set_freezable() for freezable kthread Kevin Hao
@ 2023-12-17 15:49 ` Ryusuke Konishi
0 siblings, 0 replies; 3+ messages in thread
From: Ryusuke Konishi @ 2023-12-17 15:49 UTC (permalink / raw)
To: Kevin Hao; +Cc: linux-nilfs, Rafael J. Wysocki, Pavel Machek
On Sun, Dec 17, 2023 at 10:50 PM Kevin Hao wrote:
>
> The kernel thread function nilfs_segctor_thread() invokes
> the try_to_freeze() in its loop. But all the kernel threads are
> non-freezable by default. So if we want to make a kernel thread to be
> freezable, we have to invoke set_freezable() explicitly.
>
> Signed-off-by: Kevin Hao <haokexin@gmail.com>
> ---
> fs/nilfs2/segment.c | 1 +
> 1 file changed, 1 insertion(+)
Thank you!
I'll grab this and send it upstream.
Ryusuke Konishi
>
> diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
> index 52995838f2de..2590a0860eab 100644
> --- a/fs/nilfs2/segment.c
> +++ b/fs/nilfs2/segment.c
> @@ -2588,6 +2588,7 @@ static int nilfs_segctor_thread(void *arg)
> "segctord starting. Construction interval = %lu seconds, CP frequency < %lu seconds",
> sci->sc_interval / HZ, sci->sc_mjcp_freq / HZ);
>
> + set_freezable();
> spin_lock(&sci->sc_state_lock);
> loop:
> for (;;) {
> --
> 2.39.2
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH] nilfs2: Add missing set_freezable() for freezable kthread
@ 2023-12-19 9:09 Ryusuke Konishi
0 siblings, 0 replies; 3+ messages in thread
From: Ryusuke Konishi @ 2023-12-19 9:09 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-nilfs, linux-kernel
From: Kevin Hao <haokexin@gmail.com>
The kernel thread function nilfs_segctor_thread() invokes
the try_to_freeze() in its loop. But all the kernel threads are
non-freezable by default. So if we want to make a kernel thread to be
freezable, we have to invoke set_freezable() explicitly.
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
---
Andrew, please add this to the queue for the next merge window (if
it's still ok). This fixes an issue where the log writer thread was
not calling try_to_freeze() as intended when starting suspend or
hibernation.
I haven't run into any problems with or without this change in various
suspend/hibernation tests so far, so I haven't added a Cc tag to the
stable team.
If any suspend failures are reported due to the lack of this setup,
I will separately request the stable team to backport this.
Thanks,
Ryusuke Konishi
fs/nilfs2/segment.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index 52995838f2de..2590a0860eab 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -2588,6 +2588,7 @@ static int nilfs_segctor_thread(void *arg)
"segctord starting. Construction interval = %lu seconds, CP frequency < %lu seconds",
sci->sc_interval / HZ, sci->sc_mjcp_freq / HZ);
+ set_freezable();
spin_lock(&sci->sc_state_lock);
loop:
for (;;) {
--
2.34.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
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