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Wong" Subject: Re: [PATCH 2/2] mm: introduce PF_MEMALLOC_NOWARN Message-ID: References: <20240126220756.395187-1-kent.overstreet@linux.dev> <20240126220756.395187-2-kent.overstreet@linux.dev> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240126220756.395187-2-kent.overstreet@linux.dev> X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 214D84000E X-Stat-Signature: zd1fnz5tji3ijcddm3agj1z8hxxf9nsq X-HE-Tag: 1706456734-836106 X-HE-Meta: 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 ih3qHTF9 66dqMP7vCKC9LCP3tM2awXMr0frNvWPHv0vmNut6u3UrT9XCLUT+xc4QAkdZkuTI0N8UY0AAeEemD/z9uaV3Z1MTSJvfo3uN3OmIZook5D6KJXFuGfXITRtEC+jo8gwfh/v3oaZ17SR2ZcnqyEd2kH2Bin9Htp+4DpQFc2xtGwMP6aaAotMk4JQb8eZGgAEYQPKniRYndPq1B0SVwCcQBER+xpSQpVLd+qMd6IC6DUkgoLyxQMKOYBhLRjub9gRY7eHjg X-Bogosity: Ham, tests=bogofilter, spamicity=0.000002, 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 26-01-24 17:07:56, Kent Overstreet wrote: > If we're using PF_MEMALLOC, we might have a fallback and might not to > warn about a failing allocation - thus we need a PF_* equivalent of > __GFP_NOWARN. Could you be more specific about the user? Is this an allocation from the reclaim path or an explicit PF_MEMALLOC one? It would be also really helpful to explain why GFP_NOWARN cannot be used directly. Thanks! -- Michal Hocko SUSE Labs