netdev - Re: [PATCH bpf-next 7/8] xdp: remove map_to

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Message-ID: <87lfr96ftg.fsf@toke.dk>
Date:   Wed, 18 Dec 2019 12:20:11 +0100
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Björn Töpel <bjorn.topel@...il.com>,
        netdev@...r.kernel.org, ast@...nel.org, daniel@...earbox.net
Cc:     Björn Töpel <bjorn.topel@...el.com>,
        bpf@...r.kernel.org, davem@...emloft.net,
        jakub.kicinski@...ronome.com, hawk@...nel.org,
        john.fastabend@...il.com, magnus.karlsson@...el.com,
        jonathan.lemon@...il.com
Subject: Re: [PATCH bpf-next 7/8] xdp: remove map_to_flush and map swap detection

Björn Töpel <bjorn.topel@...il.com> writes:

> From: Björn Töpel <bjorn.topel@...el.com>
>
> Now that all XDP maps that can be used with bpf_redirect_map() tracks
> entries to be flushed in a global fashion, there is not need to track
> that the map has changed and flush from xdp_do_generic_map()
> anymore. All entries will be flushed in xdp_do_flush_map().
>
> This means that the map_to_flush can be removed, and the corresponding
> checks. Moving the flush logic to one place, xdp_do_flush_map(), give
> a bulking behavior and performance boost.
>
> Signed-off-by: Björn Töpel <bjorn.topel@...el.com>

Acked-by: Toke Høiland-Jørgensen <toke@...hat.com>