linux-kernel - Re: [PATCH 2/2] iov_iter: iov_folioq_get_pages: don't leave empty slot behind

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Message-ID: <385705.1754923134@warthog.procyon.org.uk>
Date: Mon, 11 Aug 2025 15:38:54 +0100
From: David Howells <dhowells@...hat.com>
To: asmadeus@...ewreck.org
Cc: dhowells@...hat.com, "Matthew Wilcox (Oracle)" <willy@...radead.org>,
    Christian Brauner <brauner@...nel.org>,
    Alexander Viro <viro@...iv.linux.org.uk>,
    Andrew Morton <akpm@...ux-foundation.org>,
    Maximilian Bosch <maximilian@...sch.me>, Ryan Lahfa <ryan@...fa.xyz>,
    Christian Theune <ct@...ingcircus.io>,
    Arnout Engelen <arnout@...t.net>, linux-kernel@...r.kernel.org,
    linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 2/2] iov_iter: iov_folioq_get_pages: don't leave empty slot behind

Dominique Martinet via B4 Relay wrote:

> From: Dominique Martinet <asmadeus@...ewreck.org>
> 
> After advancing into a folioq it makes more sense to point to the next
> slot than at the end of the current slot.
> This should not be needed for correctness, but this also happens to
> "fix" the 9p bug with iterate_folioq() not copying properly.
> 
> Signed-off-by: Dominique Martinet <asmadeus@...ewreck.org>

Acked-by: David Howells <dhowells@...hat.com>