netdev - Re: [PATCH] mm: Decline to manipulate the refcount on a slab page

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Message-ID: <Z88vUFweLyk5s8UD@casper.infradead.org>
Date: Mon, 10 Mar 2025 18:28:32 +0000
From: Matthew Wilcox <willy@...radead.org>
To: Hannes Reinecke <hare@...e.de>
Cc: netdev@...r.kernel.org, Vlastimil Babka <vbabka@...e.cz>
Subject: Re: [PATCH] mm: Decline to manipulate the refcount on a slab page

On Mon, Mar 10, 2025 at 05:57:51PM +0100, Hannes Reinecke wrote:
> On 3/10/25 15:27, Matthew Wilcox (Oracle) wrote:
> I assume we will have a discussion at LSF around frozen pages/slab
> behaviour?
> It's not just networking, also every driver using iov_alloc_pages() and
> friends is potentially affected.
> And it would be good to clarify rules how these iterators should be
> used.

Sure, we can do that.  I haven't conducted a deep survey of how many
page users really need a refcount, so I'll have things to learn too.