From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kraus, NechamaX Date: Wed, 8 Dec 2021 10:15:30 +0200 Subject: [Intel-wired-lan] [PATCH net-next 7/9] igc: switch to napi_build_skb() In-Reply-To: <20211123171840.157471-8-alexandr.lobakin@intel.com> References: <20211123171840.157471-1-alexandr.lobakin@intel.com> <20211123171840.157471-8-alexandr.lobakin@intel.com> Message-ID: <2eb0a775-2035-f806-b391-d3ce8d3e53a2@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: intel-wired-lan@osuosl.org List-ID: On 11/23/2021 19:18, Alexander Lobakin wrote: > napi_build_skb() reuses per-cpu NAPI skbuff_head cache in order > to save some cycles on freeing/allocating skbuff_heads on every > new Rx or completed Tx. > igc driver runs Tx completion polling cycle right before the Rx > one and uses napi_consume_skb() to feed the cache with skbuff_heads > of completed entries, so it's never empty and always warm at that > moment. Switch to the napi_build_skb() to relax mm pressure on > heavy Rx. > > Signed-off-by: Alexander Lobakin > Reviewed-by: Michal Swiatkowski > --- > drivers/net/ethernet/intel/igc/igc_main.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > Tested-by: Nechama Kraus