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imf15.hostedemail.com; dkim=none; spf=pass (imf15.hostedemail.com: domain of byungchul@sk.com designates 166.125.252.92 as permitted sender) smtp.mailfrom=byungchul@sk.com; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1747054514; a=rsa-sha256; cv=none; b=hPesc2LEdknAzaPCItj0LZUmHngfF+2+lB0GIsMP/AVZ94lNeRSb6VTLyaA3Hak2o5ovlo /vfL1+IepuoBxfGlzo+L7Z3ZM/C7zmVpttFkGAZqzFWQ1O1y0rXV+13mI0fEFY8DHklKvU 4OuAleJyRoG3h2a2MLm2YufBsUG09OE= X-AuditID: a67dfc5b-681ff7000002311f-41-6821efb0d2f7 Date: Mon, 12 May 2025 21:55:06 +0900 From: Byungchul Park To: Toke =?iso-8859-1?Q?H=F8iland-J=F8rgensen?= Cc: willy@infradead.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, kernel_team@skhynix.com, kuba@kernel.org, almasrymina@google.com, ilias.apalodimas@linaro.org, harry.yoo@oracle.com, hawk@kernel.org, akpm@linux-foundation.org, ast@kernel.org, daniel@iogearbox.net, davem@davemloft.net, john.fastabend@gmail.com, andrew+netdev@lunn.ch, edumazet@google.com, pabeni@redhat.com, vishal.moola@gmail.com Subject: Re: [RFC 13/19] page_pool: expand scope of is_pp_{netmem,page}() to global Message-ID: <20250512125506.GD45370@system.software.com> References: <20250509115126.63190-1-byungchul@sk.com> <20250509115126.63190-14-byungchul@sk.com> <87y0v22dzn.fsf@toke.dk> MIME-Version: 1.0 Content-Type: text/plain; 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> > > > +bool is_pp_netmem(netmem_ref netmem); > > +bool is_pp_page(struct page *page); > > #endif /* _NET_PAGE_POOL_H */ > > diff --git a/net/core/page_pool.c b/net/core/page_pool.c > > index b61c1038f4c68..9c553e5a1b555 100644 > > --- a/net/core/page_pool.c > > +++ b/net/core/page_pool.c > > @@ -1225,3 +1225,13 @@ void net_mp_niov_clear_page_pool(struct netmem_desc *niov) > > > > page_pool_clear_pp_info(netmem); > > } > > + > > +bool is_pp_netmem(netmem_ref netmem) > > +{ > > + return (netmem_get_pp_magic(netmem) & ~0x3UL) == PP_SIGNATURE; > > +} > > + > > +bool is_pp_page(struct page *page) > > +{ > > + return is_pp_netmem(page_to_netmem(page)); > > +} > > diff --git a/net/core/skbuff.c b/net/core/skbuff.c > > index 6cbf77bc61fce..11098c204fe3e 100644 > > --- a/net/core/skbuff.c > > +++ b/net/core/skbuff.c > > @@ -893,11 +893,6 @@ static void skb_clone_fraglist(struct sk_buff *skb) > > skb_get(list); > > } > > > > -static bool is_pp_netmem(netmem_ref netmem) > > -{ > > - return (netmem_get_pp_magic(netmem) & ~0x3UL) == PP_SIGNATURE; > > -} > > - > > This has already been moved to mm.h (and the check changed) by commit: > > cd3c93167da0 ("page_pool: Move pp_magic check into helper functions") > > You should definitely rebase this series on top of that (and the > subsequent ee62ce7a1d90 ("page_pool: Track DMA-mapped pages and unmap > them when destroying the pool")), as these change the semantics of how > page_pool interacts with struct page. > > Both of these are in net-next, which Mina already asked you to rebase > on, so I guess you'll pick it up there, put flagging it here just for > completeness :) I will not miss it. Thanks. Byungchul > > -Toke >