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| author | David Wei <dw@davidwei.uk> | 2024-06-26 20:01:59 -0700 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2024-07-02 15:00:11 +0200 |
| commit | d7f39aee79f04eeaa42085728423501b33ac5be5 (patch) | |
| tree | 7926a7f07708adb12c5b7f2965ff094ddf108949 | |
| parent | e2dd0d0593c17f32c7263e9d6f7554ecaabb0baf (diff) | |
| download | linux-stable-d7f39aee79f04eeaa42085728423501b33ac5be5.tar.gz linux-stable-d7f39aee79f04eeaa42085728423501b33ac5be5.tar.bz2 linux-stable-d7f39aee79f04eeaa42085728423501b33ac5be5.zip | |
page_pool: export page_pool_disable_direct_recycling()
56ef27e3 unexported page_pool_unlink_napi() and renamed it to
page_pool_disable_direct_recycling(). This is because there was no
in-tree user of page_pool_unlink_napi().
Since then Rx queue API and an implementation in bnxt got merged. In the
bnxt implementation, it broadly follows the following steps: allocate
new queue memory + page pool, stop old rx queue, swap, then destroy old
queue memory + page pool.
The existing NAPI instance is re-used so when the old page pool that is
no longer used but still linked to this shared NAPI instance is
destroyed, it will trigger warnings.
In my initial patches I unlinked a page pool from a NAPI instance
directly. Instead, export page_pool_disable_direct_recycling() and call
that instead to avoid having a driver touch a core struct.
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David Wei <dw@davidwei.uk>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
| -rw-r--r-- | include/net/page_pool/types.h | 1 | ||||
| -rw-r--r-- | net/core/page_pool.c | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/include/net/page_pool/types.h b/include/net/page_pool/types.h index 7e8477057f3d..9093a964fc33 100644 --- a/include/net/page_pool/types.h +++ b/include/net/page_pool/types.h @@ -229,6 +229,7 @@ struct page_pool *page_pool_create_percpu(const struct page_pool_params *params, struct xdp_mem_info; #ifdef CONFIG_PAGE_POOL +void page_pool_disable_direct_recycling(struct page_pool *pool); void page_pool_destroy(struct page_pool *pool); void page_pool_use_xdp_mem(struct page_pool *pool, void (*disconnect)(void *), const struct xdp_mem_info *mem); diff --git a/net/core/page_pool.c b/net/core/page_pool.c index 3927a0a7fa9a..5f1ed6f2ca8f 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -1014,7 +1014,7 @@ void page_pool_use_xdp_mem(struct page_pool *pool, void (*disconnect)(void *), pool->xdp_mem_id = mem->id; } -static void page_pool_disable_direct_recycling(struct page_pool *pool) +void page_pool_disable_direct_recycling(struct page_pool *pool) { /* Disable direct recycling based on pool->cpuid. * Paired with READ_ONCE() in page_pool_napi_local(). @@ -1032,6 +1032,7 @@ static void page_pool_disable_direct_recycling(struct page_pool *pool) WRITE_ONCE(pool->p.napi, NULL); } +EXPORT_SYMBOL(page_pool_disable_direct_recycling); void page_pool_destroy(struct page_pool *pool) { |