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From: Vlastimil Babka <vbabka@suse.cz>
To: Mike Galbraith <efault@gmx.de>, linux-rt-users@vger.kernel.org
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [patch] mm, zsmalloc: Convert zsmalloc_handle.lock to spinlock_t
Date: Tue, 24 Aug 2021 13:14:52 +0200	[thread overview]
Message-ID: <b8a39e05-696a-d459-c651-a3415bc09886@suse.cz> (raw)
In-Reply-To: <70cc66840bbd9446061fc40088575565d8d98e37.camel@gmx.de>

On 8/24/21 13:08, Mike Galbraith wrote:
> 
> local_lock_t becoming a synonym of spinlock_t had consequences for the RT
> mods to zsmalloc, which were taking a mutex while holding a local_lock,
> inspiring a lockdep "BUG: Invalid wait context" gripe.
> 
> Converting zsmalloc_handle.lock to a spinlock_t restored lockdep silence.
> 
> Signed-off-by: Mike Galbraith <efault@gmx.de>

BTW, does anyone really run zswap on a RT system?

  reply	other threads:[~2021-08-24 11:14 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-24 11:08 [patch] mm, zsmalloc: Convert zsmalloc_handle.lock to spinlock_t Mike Galbraith
2021-08-24 11:14 ` Vlastimil Babka [this message]
2021-08-24 11:32   ` Mike Galbraith
2021-08-26 14:57   ` Sebastian Andrzej Siewior

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