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Date: Sat, 13 Apr 2024 21:43:57 -0700
From: Shakeel Butt <shakeel.butt@linux.dev>
To: Yosry Ahmed <yosryahmed@google.com>
Cc: Yu Zhao <yuzhao@google.com>, Andrew Morton <akpm@linux-foundation.org>, 
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Subject: Re: [syzbot] [cgroups?] [mm?] WARNING in __mod_memcg_lruvec_state
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On Thu, Apr 04, 2024 at 09:47:34PM -0700, Yosry Ahmed wrote:
[...]
> >
> > Probably an RT build where _irqsave doesn't disable IRQ?
> 
> Yeah, that's possible. I don't have enough familiarity with RT to know
> for sure. Perhaps lruvec->lru_lock needs to be changed to a
> raw_spinlock_t? I am not sure if that's the correct course of action.

The kernel config does not have CONFIG_PREEMPT_RT enabled. However I
have not idea how irqs are getting enabled to raise this warning.