From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: [PATCH 02/24] net, diet: Reduce NAPI hash table for CONFIG_BASE_SMALL Date: Mon, 5 May 2014 15:25:51 -0700 Message-ID: <1399328773-6531-3-git-send-email-andi@firstfloor.org> References: <1399328773-6531-1-git-send-email-andi@firstfloor.org> Cc: linux-kernel@vger.kernel.org, tom.zanussi@linux.intel.com, Andi Kleen To: netdev@vger.kernel.org Return-path: Received: from mga09.intel.com ([134.134.136.24]:39433 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933039AbaEEW0T (ORCPT ); Mon, 5 May 2014 18:26:19 -0400 In-Reply-To: <1399328773-6531-1-git-send-email-andi@firstfloor.org> Sender: netdev-owner@vger.kernel.org List-ID: From: Andi Kleen For really small kernels, use only 3 bits for the hash table. Signed-off-by: Andi Kleen --- net/core/dev.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/net/core/dev.c b/net/core/dev.c index d2c8a06..c6cbe69 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -175,7 +175,14 @@ EXPORT_SYMBOL(dev_base_lock); static DEFINE_SPINLOCK(napi_hash_lock); static unsigned int napi_gen_id; -static DEFINE_HASHTABLE(napi_hash, 8); + +#ifdef CONFIG_BASE_SMALL +#define NAPI_HASH_BITS 3 +#else +#define NAPI_HASH_BITS 8 +#endif + +static DEFINE_HASHTABLE(napi_hash, NAPI_HASH_BITS); static seqcount_t devnet_rename_seq; -- 1.9.0