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docs: net: page_pool: drop reference to removed PP_FLAG_PAGE_FRAG

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The flag was removed in commit 09d96ee567 ("page_pool: remove
PP_FLAG_PAGE_FRAG"), but the documentation still mentions it when
describing fragment usage. Drop the stale reference; the fragment
API does not require any opt-in flag.

Reviewed-by: Nicolai Buchwitz <nb@tipi-net.de>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260526155722.2790742-2-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2026-05-26 08:57:19 -07:00
parent 4933a65836
commit 63c4530050
1 changed files with 2 additions and 3 deletions
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5
Documentation/networking/page_pool.rst
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@ -98,9 +98,8 @@ If in doubt set ``offset`` to 0, ``max_len`` to ``PAGE_SIZE`` and
pass -1 as ``dma_sync_size``. That combination of arguments is always
correct.
Note that the syncing parameters are for the entire page.
This is important to remember when using fragments (``PP_FLAG_PAGE_FRAG``),
where allocated buffers may be smaller than a full page.
Note that the syncing parameters are for the **entire page**, even if
the driver allocates fragments (e.g. via ``page_pool_dev_alloc_frag()``).
Unless the driver author really understands page pool internals
it's recommended to always use ``offset = 0``, ``max_len = PAGE_SIZE``
with fragmented page pools.