From: David S. Miller Date: Thu, 11 Feb 2016 16:59:17 +0000 (-0500) Subject: Merge branch 'net-mitigate-kmem_free-slowpath' X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3134b9f019f2604f05fd65a2c2d4e57193f7ddfb;p=linux-beck.git Merge branch 'net-mitigate-kmem_free-slowpath' Jesper Dangaard Brouer says: ==================== net: mitigating kmem_cache free slowpath This patchset is the first real use-case for kmem_cache bulk _free_. The use of bulk _alloc_ is NOT included in this patchset. The full use have previously been posted here [1]. The bulk free side have the largest benefit for the network stack use-case, because network stack is hitting the kmem_cache/SLUB slowpath when freeing SKBs, due to the amount of outstanding SKBs. This is solved by using the new API kmem_cache_free_bulk(). Introduce new API napi_consume_skb(), that hides/handles bulk freeing for the caller. The drivers simply need to use this call when freeing SKBs in NAPI context, e.g. replacing their calles to dev_kfree_skb() / dev_consume_skb_any(). Driver ixgbe is the first user of this new API. [1] http://thread.gmane.org/gmane.linux.network/384302/focus=397373 ==================== Signed-off-by: David S. Miller --- 3134b9f019f2604f05fd65a2c2d4e57193f7ddfb