From: Steffen Trumtrar <s.trumtrar@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH v4 3/3] include: net: align PKTSIZE to 64 bytes
Date: Fri, 01 Dec 2023 14:51:29 +0100 [thread overview]
Message-ID: <20231201-v2023-08-0-topic-macb-v4-3-b4f5d64de1ad@pengutronix.de> (raw)
In-Reply-To: <20231201-v2023-08-0-topic-macb-v4-0-b4f5d64de1ad@pengutronix.de>
PKTSIZE is used to allocate network packet storage.
Make it fill a cache line so drivers using it don't accidentally flush
adjacent packets.
Suggested-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
---
include/net.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/net.h b/include/net.h
index a0ef8bee04..63109465f9 100644
--- a/include/net.h
+++ b/include/net.h
@@ -236,9 +236,9 @@ struct icmphdr {
* Maximum packet size; used to allocate packet storage.
* TFTP packets can be 524 bytes + IP header + ethernet header.
* Lets be conservative, and go for 38 * 16. (Must also be
- * a multiple of 32 bytes).
+ * a multiple of 64 bytes).
*/
-#define PKTSIZE 1518
+#define PKTSIZE 1536
/**********************************************************************/
/*
--
2.40.1
next prev parent reply other threads:[~2023-12-01 13:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-01 13:51 [PATCH v4 0/3] net: macb: fix dma usage Steffen Trumtrar
2023-12-01 13:51 ` [PATCH v4 1/3] net: macb: fix dma_alloc for rx_buffer Steffen Trumtrar
2023-12-01 13:51 ` [PATCH v4 2/3] net: macb: convert to volatile accesses Steffen Trumtrar
2023-12-01 13:51 ` Steffen Trumtrar [this message]
2023-12-05 8:04 ` [PATCH v4 0/3] net: macb: fix dma usage Sascha Hauer
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