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b=scZ7fIIAjmpG3n3F9Q5lLUk8HbQXHeXjOTMhm7EB1qihhQhQZ2psy2l53qUs1yeeC HmsQQGjCw9+09migWcXEzPLTShaS2/ATeGIkPJFwZSUpg6VbeZhvlYhb9lD0wbSDE7 G5c1uJGoMLmLbPNsWkAs5qP8EX7OvZJ5nxzjk9rQ= Date: Wed, 12 Nov 2025 14:22:13 -0800 From: Andrew Morton To: "Vishal Moola (Oracle)" Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, Uladzislau Rezki , Christoph Hellwig Subject: Re: [PATCH v2 0/4] make vmalloc gfp flags usage more apparent Message-Id: <20251112142213.bc01a3abe37de98f9d40e392@linux-foundation.org> In-Reply-To: <20251112185834.32487-1-vishal.moola@gmail.com> References: <20251112185834.32487-1-vishal.moola@gmail.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 8B0C440012 X-Stat-Signature: eeaqhp58maobred4h9hazfefb4fx4a7g X-Rspam-User: X-HE-Tag: 1762986135-921600 X-HE-Meta: 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 z+fN24q/ X+X0yXNocC7jcLgflJ0keWRpCsaujyfI84fZ0gwew/LEHkC4fNUF2gCtMA0wbG/peA5nLw/yMJ6B8Jdh92iwwnLFcs5WQ2rzBZosk3cSu9aq941BBcpqiTuyFFCkW0Rdwo2U4xhDNoe/VzYO7NvQvObmGXXqRrj+PhLhVi38GiNPZsX5z84OCWqBa0Wd1yDPgedQg0QGOiXGc/iKnsrU2eBrSlBs8et7JpXyePi8nCj+IOndS6sxSm8o3YYY2aWW1oPHgzfIzaqcOZuN4t4ChgNzTJF9Ylrg9de2WzJWhs9u91LveTrgjJV2hDM42dFSCYuDYL00LldzMTG82lZlrjYFVLQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, 12 Nov 2025 10:58:29 -0800 "Vishal Moola (Oracle)" wrote: > v2: > - Add __GFP_HARDWALL[3] for bpf and drm users. > - cc BPF mailing list v1->v2 diff: --- a/mm/vmalloc.c~b +++ a/mm/vmalloc.c @@ -3922,10 +3922,12 @@ fail: /* * See __vmalloc_node_range() for a clear list of supported vmalloc flags. * This gfp lists all flags currently passed through vmalloc. Currently, - * __GFP_ZERO is used by BFP and __GFP_NORETRY is used by percpu. + * __GFP_ZERO is used by BPF and __GFP_NORETRY is used by percpu. Both drm + * and BPF also use GFP_USER, which is GFP_KERNEL | __GFP_HARDWALL. */ #define GFP_VMALLOC_SUPPORTED (GFP_KERNEL | GFP_ATOMIC | GFP_NOWAIT |\ - __GFP_NOFAIL | __GFP_ZERO | __GFP_NORETRY) + __GFP_NOFAIL | __GFP_ZERO | __GFP_NORETRY |\ + __GFP_HARDWALL) static gfp_t vmalloc_fix_flags(gfp_t flags) { _