Re: [PATCH] debugobject: don't wake up kswapd from fill_pool()

[Thomas Gleixner]

On Fri, May 12 2023 at 19:57, Tetsuo Handa wrote:
> On 2023/05/12 12:44, Andrew Morton wrote:
>> On Thu, 11 May 2023 22:47:32 +0900 Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> wrote:
>> 
>>> syzbot is reporting lockdep warning in fill_pool(), for GFP_ATOMIC is
>>> (__GFP_HIGH | __GFP_KSWAPD_RECLAIM) which wakes up kswapd.
>>> Since fill_pool() might be called with arbitrary locks held,
>>> fill_pool() should not assume that holding pgdat->kswapd_wait is safe.

https://lore.kernel.org/lkml/871qjldbes.ffs@tglx/