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

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Message-ID: <e67952a9-f810-4fc9-9fc3-2f94dfba16b6@suse.de>
Date: Tue, 11 Mar 2025 08:05:26 +0100
From: Hannes Reinecke <hare@...e.de>
To: Matthew Wilcox <willy@...radead.org>
Cc: netdev@...r.kernel.org, Vlastimil Babka <vbabka@...e.cz>,
 linux-mm@...ck.org
Subject: Re: [PATCH] mm: Decline to manipulate the refcount on a slab page

On 3/10/25 19:28, Matthew Wilcox wrote:
> 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.

That would be awesome.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                  Kernel Storage Architect
hare@...e.de                                +49 911 74053 688
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich