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| author |  Jakub Kicinski <kuba@kernel.org>
| 2023-11-20 16:00:35 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org>
| 2023-11-21 17:22:30 -0800 |
| commit | 2da0cac1e9494f34c5a3438e5c4c7e662e1b7445 (patch) | |
| tree | 7426b591fcfd20c14af1a71aec38adce9086ab25 | |
| parent | net: page_pool: split the page_pool_params into fast and slow (diff) | |
| download | linux-2da0cac1e9494f34c5a3438e5c4c7e662e1b7445.tar.gz linux-2da0cac1e9494f34c5a3438e5c4c7e662e1b7445.tar.bz2 linux-2da0cac1e9494f34c5a3438e5c4c7e662e1b7445.zip | |
net: page_pool: avoid touching slow on the fastpath
To fully benefit from previous commit add one byte of state
in the first cache line recording if we need to look at
the slow part.
The packing isn't all that impressive right now, we create
a 7B hole. I'm expecting Olek's rework will reshuffle this,
anyway.
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Mina Almasry <almasrymina@google.com>
Link: https://lore.kernel.org/r/20231121000048.789613-3-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | include/net/page_pool/types.h | 2 | ||||
| -rw-r--r-- | net/core/page_pool.c | 4 |
2 files changed, 5 insertions, 1 deletions
diff --git a/include/net/page_pool/types.h b/include/net/page_pool/types.h index 23950fcc4eca..e1bb92c192de 100644 --- a/include/net/page_pool/types.h +++ b/include/net/page_pool/types.h @@ -125,6 +125,8 @@ struct page_pool_stats { struct page_pool { struct page_pool_params_fast p; + bool has_init_callback; + long frag_users; struct page *frag_page; unsigned int frag_offset; diff --git a/net/core/page_pool.c b/net/core/page_pool.c index ab22a2fdae57..df2a06d7da52 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -212,6 +212,8 @@ static int page_pool_init(struct page_pool *pool, */ } + pool->has_init_callback = !!pool->slow.init_callback; + #ifdef CONFIG_PAGE_POOL_STATS pool->recycle_stats = alloc_percpu(struct page_pool_recycle_stats); if (!pool->recycle_stats) @@ -389,7 +391,7 @@ static void page_pool_set_pp_info(struct page_pool *pool, * the overhead is negligible. */ page_pool_fragment_page(page, 1); - if (pool->slow.init_callback) + if (pool->has_init_callback) pool->slow.init_callback(page, pool->slow.init_arg); } |