From: Jesper Dangaard Brouer <brouer@redhat.com>
To: Toshiaki Makita <toshiaki.makita1@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <jakub.kicinski@netronome.com>,
Jesper Dangaard Brouer <hawk@kernel.org>,
John Fastabend <john.fastabend@gmail.com>,
netdev@vger.kernel.org, xdp-newbies@vger.kernel.org,
bpf@vger.kernel.org, "Michael S. Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>, David Ahern <dsahern@gmail.com>,
brouer@redhat.com
Subject: Re: [PATCH bpf 2/3] devmap: Add missing bulk queue free
Date: Fri, 14 Jun 2019 13:58:06 +0200 [thread overview]
Message-ID: <20190614135806.4bcb1a31@carbon> (raw)
In-Reply-To: <20190614082015.23336-3-toshiaki.makita1@gmail.com>
On Fri, 14 Jun 2019 17:20:14 +0900
Toshiaki Makita <toshiaki.makita1@gmail.com> wrote:
> dev_map_free() forgot to free bulk queue when freeing its entries.
>
> Fixes: 5d053f9da431 ("bpf: devmap prepare xdp frames for bulking")
> Signed-off-by: Toshiaki Makita <toshiaki.makita1@gmail.com>
> ---
> kernel/bpf/devmap.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c
> index e001fb1..a126d95 100644
> --- a/kernel/bpf/devmap.c
> +++ b/kernel/bpf/devmap.c
> @@ -186,6 +186,7 @@ static void dev_map_free(struct bpf_map *map)
> if (!dev)
> continue;
>
> + free_percpu(dev->bulkq);
> dev_put(dev->dev);
> kfree(dev);
> }
Do we need to call need to call dev_map_flush_old() before
free_percpu(dev->bulkq) ?
Looking the code, I guess this is not needed as, above we are ensuring
all pending flush operations have completed.
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
next prev parent reply other threads:[~2019-06-14 11:58 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-14 8:20 [PATCH bpf 0/3] Devmap fixes around memory and RCU Toshiaki Makita
2019-06-14 8:20 ` [PATCH bpf 1/3] devmap: Fix premature entry free on destroying map Toshiaki Makita
2019-06-14 11:04 ` Toke Høiland-Jørgensen
2019-06-14 12:10 ` Toke Høiland-Jørgensen
2019-06-14 12:59 ` Toshiaki Makita
2019-06-14 13:09 ` Toke Høiland-Jørgensen
2019-06-14 23:07 ` Daniel Borkmann
2019-06-15 10:10 ` Toke Høiland-Jørgensen
2019-06-14 12:20 ` Jesper Dangaard Brouer
2019-06-14 8:20 ` [PATCH bpf 2/3] devmap: Add missing bulk queue free Toshiaki Makita
2019-06-14 11:58 ` Jesper Dangaard Brouer [this message]
2019-06-14 13:03 ` Toshiaki Makita
2019-06-14 8:20 ` [PATCH bpf 3/3] devmap: Add missing RCU read lock on flush Toshiaki Makita
2019-06-14 11:07 ` Toke Høiland-Jørgensen
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