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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. Link: https://lkml.kernel.org/r/20231219090918.2329-1-konishi.ryusuke@gmail.com Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>