linux-kernel - Re: [PATCH v1 2/2] mm/show_mem: Add trylock while printing alloc info

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Message-ID: <5ce6yn4iml5tk5zpf73gbxk6z244bkchwuxfpvuervyh2zlqlc@7sanekvjpglm>
Date: Thu, 28 Aug 2025 09:35:36 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: Vlastimil Babka <vbabka@...e.cz>
Cc: Yueyang Pan <pyyjason@...il.com>, 
	Andrew Morton <akpm@...ux-foundation.org>, Suren Baghdasaryan <surenb@...gle.com>, 
	Michal Hocko <mhocko@...e.com>, Brendan Jackman <jackmanb@...gle.com>, 
	Johannes Weiner <hannes@...xchg.org>, Zi Yan <ziy@...dia.com>, Usama Arif <usamaarif642@...il.com>, 
	linux-mm@...ck.org, kernel-team@...a.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/2] mm/show_mem: Add trylock while printing alloc info

On Thu, Aug 28, 2025 at 10:41:23AM +0200, Vlastimil Babka wrote:
> > 
> > I was not aware of interrupt context before. I will change to test-and-set 
> > lock in the next version.
> 
> Perhaps simply spinlock_t with spin_trylock()?
> 

Will lockdep complain that this spinlock is taken in non-irq and irq
context without disabling irqs?