linux-kernel - Re: [PATCH v5 12/18] zsmalloc: make zspage lock preemptible

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Message-ID: <cn6utb3m7ftchpnygi36sm5fbib6momo6voiix6wlknw4dwg7h@7km27pic5lh5>
Date: Thu, 13 Feb 2025 10:53:11 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: Yosry Ahmed <yosry.ahmed@...ux.dev>
Cc: Sergey Senozhatsky <senozhatsky@...omium.org>, 
	Andrew Morton <akpm@...ux-foundation.org>, Kairui Song <ryncsn@...il.com>, Minchan Kim <minchan@...nel.org>, 
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 12/18] zsmalloc: make zspage lock preemptible

On (25/02/13 01:31), Yosry Ahmed wrote:
> > >  Hmm I know I may have been the one suggesting this, but do we actually
> > > 
> > >  need it? We disable preemption explicitly anyway before holding the
> > > 
> > >  lock.
> > > 
> > 
> > This is just to make sure that the precondition for
> > 
> > "writer is always atomic" is satisfied. But I can drop it.
> 
> Right, but why do we care?

Oh, not that we care, just wanted extra smoke-detectors.  It's gone now.