diff options
| -rw-r--r-- | include/net/page_pool/types.h | 12 | ||||
| -rw-r--r-- | net/core/page_pool.c | 10 |
2 files changed, 21 insertions, 1 deletions
diff --git a/include/net/page_pool/types.h b/include/net/page_pool/types.h index 5e43a08d3231..5460cbab5de0 100644 --- a/include/net/page_pool/types.h +++ b/include/net/page_pool/types.h @@ -130,12 +130,22 @@ struct page_pool { struct page_pool_params_fast p; int cpuid; + u32 pages_state_hold_cnt; bool has_init_callback; + /* The following block must stay within one cacheline. On 32-bit + * systems, sizeof(long) == sizeof(int), so that the block size is + * ``3 * sizeof(long)``. On 64-bit systems, the actual size is + * ``2 * sizeof(long) + sizeof(int)``. The closest pow-2 to both of + * them is ``4 * sizeof(long)``, so just use that one for simplicity. + * Having it aligned to a cacheline boundary may be excessive and + * doesn't bring any good. + */ + __cacheline_group_begin(frag) __aligned(4 * sizeof(long)); long frag_users; struct page *frag_page; unsigned int frag_offset; - u32 pages_state_hold_cnt; + __cacheline_group_end(frag); struct delayed_work release_dw; void (*disconnect)(void *pool); diff --git a/net/core/page_pool.c b/net/core/page_pool.c index dd364d738c00..95eac12e8790 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -172,12 +172,22 @@ static void page_pool_producer_unlock(struct page_pool *pool, spin_unlock_bh(&pool->ring.producer_lock); } +static void page_pool_struct_check(void) +{ + CACHELINE_ASSERT_GROUP_MEMBER(struct page_pool, frag, frag_users); + CACHELINE_ASSERT_GROUP_MEMBER(struct page_pool, frag, frag_page); + CACHELINE_ASSERT_GROUP_MEMBER(struct page_pool, frag, frag_offset); + CACHELINE_ASSERT_GROUP_SIZE(struct page_pool, frag, 4 * sizeof(long)); +} + static int page_pool_init(struct page_pool *pool, const struct page_pool_params *params, int cpuid) { unsigned int ring_qsize = 1024; /* Default */ + page_pool_struct_check(); + memcpy(&pool->p, ¶ms->fast, sizeof(pool->p)); memcpy(&pool->slow, ¶ms->slow, sizeof(pool->slow)); |