From: "Björn Töpel" <bjorn.topel@gmail.com>
To: ast@kernel.org, daniel@iogearbox.net, netdev@vger.kernel.org
Cc: "Björn Töpel" <bjorn.topel@intel.com>,
magnus.karlsson@intel.com, magnus.karlsson@gmail.com,
bpf@vger.kernel.org, jonathan.lemon@gmail.com
Subject: [PATCH bpf] xsk: relax UMEM headroom alignment
Date: Wed, 18 Sep 2019 09:57:39 +0200 [thread overview]
Message-ID: <20190918075739.19451-1-bjorn.topel@gmail.com> (raw)
From: Björn Töpel <bjorn.topel@intel.com>
This patch removes the 64B alignment of the UMEM headroom. There is
really no reason for it, and having a headroom less than 64B should be
valid.
Fixes: c0c77d8fb787 ("xsk: add user memory registration support sockopt")
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
---
net/xdp/xdp_umem.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
index 688aac7a6943..0e81a7fd2df7 100644
--- a/net/xdp/xdp_umem.c
+++ b/net/xdp/xdp_umem.c
@@ -335,8 +335,6 @@ static int xdp_umem_reg(struct xdp_umem *umem, struct xdp_umem_reg *mr)
if (chunks < chunks_per_page || chunks % chunks_per_page)
return -EINVAL;
- headroom = ALIGN(headroom, 64);
-
size_chk = chunk_size - headroom - XDP_PACKET_HEADROOM;
if (size_chk < 0)
return -EINVAL;
--
2.20.1
next reply other threads:[~2019-09-18 7:57 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-18 7:57 Björn Töpel [this message]
2019-09-19 12:33 ` [PATCH bpf] xsk: relax UMEM headroom alignment Daniel Borkmann
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