From 6ed01097f4378199614fe625495657af7c601cea Mon Sep 17 00:00:00 2001 From: Vakul Garg Date: Thu, 18 Jul 2019 11:29:16 +0000 Subject: [PATCH] crypto: caam/qi2 - Increase napi budget to process more caam responses MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit While running ipsec processing for traffic through multiple network interfaces, it is observed that caam driver gets less time to poll responses from caam block compared to ethernet driver. This is because ethernet driver has as many napi instances per cpu as the number of ethernet interfaces in system. Therefore, caam driver's napi executes lesser than the ethernet driver's napi instances. This results in situation that we end up submitting more requests to caam (which it is able to finish off quite fast), but don't dequeue the responses at same rate. This makes caam response FQs bloat with large number of frames. In some situations, it makes kernel crash due to out-of-memory. To prevent it We increase the napi budget of dpseci driver to a big value so that caam driver is able to drain its response queues at enough rate. Signed-off-by: Vakul Garg Reviewed-by: Horia Geantă Signed-off-by: Herbert Xu --- drivers/crypto/caam/caamalg_qi2.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/crypto/caam/caamalg_qi2.h b/drivers/crypto/caam/caamalg_qi2.h index be50854..973f629 100644 --- a/drivers/crypto/caam/caamalg_qi2.h +++ b/drivers/crypto/caam/caamalg_qi2.h @@ -15,7 +15,7 @@ #define DPAA2_CAAM_STORE_SIZE 16 /* NAPI weight *must* be a multiple of the store size. */ -#define DPAA2_CAAM_NAPI_WEIGHT 64 +#define DPAA2_CAAM_NAPI_WEIGHT 512 /* The congestion entrance threshold was chosen so that on LS2088 * we support the maximum throughput for the available memory -- 2.7.4