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bh=TmrJSqLe0Kzc3iV/lLlnlsBxYG9x8L9YpROtD+7dxhI=; b=zj5/zJeX2oZ6X8PR5xB+7XcU6/D0VmJpiJmRnNOSN8FVEmLyCVwTne6SboXRlrjgxLYbxO LwS5X/F+UfhhSi7WAZh127uW3abzqub02uhAJQtMf5cPGNv9XeSAcF1VHAv4dZsUAZoRdQ bgipSi6zI6FsB1UvS87wWwg/EcQFM6fH59zelKjdWhLayRjDPBd80w0/TvFqkirngT8Bm0 F7kgvxeaBc+wLaKabUTnDHLBekrlnBZE/h1KNYIx8PVJsy7aC580QLgdF5uBb8E0FLjDSE 9NaKRBST+e2TLRiAUyetTTSjdRLkLUt2m+LuJ+I4LJwvLhZc2HFlC7E8P61msw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1674117143; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=TmrJSqLe0Kzc3iV/lLlnlsBxYG9x8L9YpROtD+7dxhI=; b=9pNbI3J1w/ieCG65fZGpgxw5G8xrSpXRpEScS5Bw0tI8HvT1DUbnOIg20juWhrFAPMcklv gHDN7PFMzqfF2EAA== From: Sebastian Andrzej Siewior To: Hillf Danton Cc: Mel Gorman , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Davidlohr Bueso , linux-mm@kvack.org, LKML Subject: Re: [PATCH v2] locking/rwbase: Prevent indefinite writer starvation Message-ID: References: <20230117083817.togfwc5cy4g67e5r@techsingularity.net> <20230117165021.t5m7c2d6frbbfzig@techsingularity.net> <20230119011538.3247-1-hdanton@sina.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20230119011538.3247-1-hdanton@sina.com> X-Rspam-User: X-Rspamd-Server: rspam03 X-Stat-Signature: 43p45my4d4y3zrz1wpy9eruw1qx5b63r X-Rspamd-Queue-Id: A00C340018 X-HE-Tag: 1674117145-960942 X-HE-Meta: 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 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: On 2023-01-19 09:15:38 [+0800], Hillf Danton wrote: > But starvation remains same given RT contenders, even if prevent is put > on your subject line. > > What sense could the 4ms deadline make at best if RT contenders extend > it to a week? > What will happen if RT contenders are hurt by the starvation deadline? As far as Mel's efforts go, I am satisfied so far. Maybe you can improve it further afterwards. Sebastian