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Fri, 23 Aug 2024 13:25:41 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Matt Fleming Date: Fri, 23 Aug 2024 21:25:30 +0100 Message-ID: Subject: Re: order-0 page alloc failures during interrupt context on v6.6.43 To: "Christoph Lameter (Ampere)" Cc: linux-mm@kvack.org, willy@infradead.org, kernel-team Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Stat-Signature: aaftdy3ufc1zisztdzp6oohjmotqw5iw X-Rspamd-Queue-Id: DC33040011 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1724444743-984253 X-HE-Meta: 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 Vtw2uZ+4 Pnoam13JagfOmjONo2G7Knyhc13juMGXjsOf97F5ICApQ+jTU43XImgsQ9xGrK/Kn8TEMLYiYiGKnq4YfqQ0zN2tRbl2tjcQr965xhrOV49WKYd/s1AMMNzmZ+86Y9YOavkwxVhQCYauS0bobrlm2EXvlgdsrKXqIAxhIFCTBw2w3N8yI2if5DM/5HF8baPmweJsYLA8SaIo3CQMUjHHb5QTDYVzsL5R83w8bajHJQATxiUG/ZimT9vA9lDC/8O2akg0g X-Bogosity: Ham, tests=bogofilter, spamicity=0.346942, 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, Aug 23, 2024 at 5:09=E2=80=AFPM Christoph Lameter (Ampere) wrote: > > Look at the full kernel log output until the time of the allocation > failure? It looks like there is enough memory in every zone to satify the > allocation request. > > Stacktrace looks like memory is pushed out via kswapd and zram to > somewhere and then we get interrupted by incoming network traffic. Sure. My original email was a bit terse because it was a continuation from a discussion on IRC and I didn't explicitly say so but I already read the stacktrace. As you say, given that there's plenty of free pages in the zones including factoring in the watermarks, it's not clear to me why the allocation failed at all.