netdev - Re: [PATCH v2] net: allow skb_datagram_iter to be called from any context

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Message-ID: <20240625071028.2324a9f5@kernel.org>
Date: Tue, 25 Jun 2024 07:10:28 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Paolo Abeni <pabeni@...hat.com>
Cc: Sagi Grimberg <sagi@...mberg.me>, netdev@...r.kernel.org, Eric Dumazet
 <edumazet@...gle.com>, David Howells <dhowells@...hat.com>, Matthew Wilcox
 <willy@...radead.org>
Subject: Re: [PATCH v2] net: allow skb_datagram_iter to be called from any
 context

On Tue, 25 Jun 2024 15:27:41 +0200 Paolo Abeni wrote:
> On Sun, 2024-06-23 at 11:12 +0300, Sagi Grimberg wrote:
> > We only use the mapping in a single context, so kmap_local is sufficient
> > and cheaper. Make sure to use skb_frag_foreach_page as skb frags may
> > contain highmem compound pages and we need to map page by page.
> > 
> > Signed-off-by: Sagi Grimberg <sagi@...mberg.me>  
> 
> V1 is already applied to net-next, you need to either send a revert
> first or share an incremental patch (that would be a fix, and will need
> a fixes tag).
> 
> On next revision, please include the target tree in the subj prefix.

I think the bug exists in net (it just requires an arch with HIGHMEM 
to be hit). So send the fix based on net/master and we'll deal with 
the net-next conflict? Or you can send a revert for net-next at the
same time, but I think the fix should target net.