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From: Roman Gushchin To: Vlastimil Babka Cc: Akinobu Mita , Christoph Lameter , David Rientjes , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , "Naveen N. Rao" , Anil S Keshavamurthy , "David S. Miller" , Masami Hiramatsu , Steven Rostedt , Mark Rutland , Jiri Olsa , Hyeonggon Yoo <42.hyeyoo@gmail.com>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, bpf@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: Re: [PATCH RFC 4/4] mm, page_alloc: add static key for should_fail_alloc_page() Message-ID: References: <20240531-fault-injection-statickeys-v1-0-a513fd0a9614@suse.cz> <20240531-fault-injection-statickeys-v1-4-a513fd0a9614@suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240531-fault-injection-statickeys-v1-4-a513fd0a9614@suse.cz> X-Migadu-Flow: FLOW_OUT X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: C218FC0004 X-Stat-Signature: g19rxxr8jj17hwokstqj79etigb7kbkr X-HE-Tag: 1717199418-402601 X-HE-Meta: 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 Z1nkGXHV HnsQrr0flimIo8tNNSj5BjjcGcPI9pO1rwuNBZKM7XeczuG/mLy+THnmey6hdiNKUhp+zmmO06M6VSFqdAQRQIbM4ZBemnNFe6/BnuymT8RxsgHTvgX+2eVtpbQSd0+FkCsnBDGlh4WGqaUARnIcFONbXQHYvIWnOQ+JJIylXQsEIZdmwAsYhuU27nAMf8pOBa/lRnonrVOOG5crYwS3l+cwk1fFMVb28jq2s3+v6LTjxecCZ8WZDb6FZsg== 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 Fri, May 31, 2024 at 11:33:35AM +0200, Vlastimil Babka wrote: > Similarly to should_failslab(), remove the overhead of calling the > noinline function should_fail_alloc_page() with a static key that guards > the allocation hotpath callsite and is controlled by the fault and error > injection frameworks. > > Signed-off-by: Vlastimil Babka Reviewed-by: Roman Gushchin Thanks!