From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B82642741C0 for ; Tue, 6 Jan 2026 04:38:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767674328; cv=none; b=F49CdZhDXnrUgKnhFrnwO7ua7sf8i25HIGj0yhpL9BYqGRG18xR0BrahHE2SSeVL2Y8VyplNz97B3UwGD5VpMoXaHMbE/fYwl2kiS1XiMc+wB2PCNaUBgVwuF2iCVCcfK6G9GOuiFf32HL5m8Oz9eIH6Cwe52ilPa+uqsZ9Gr+k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767674328; c=relaxed/simple; bh=j610qlVh6SVPPFgW9VzCRvLhAqAMQu8XW3rBj/KadDU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=jNmXBxxmxXWF6FteehSqepYUjqHgz3ZPmV1DceUrWHFHdwFCcdTCuCzB0r1e7bR67VF5y1K1K6TdBitkkuIMnsuAiTaPGMV1v7egakdwwk7w1piT/CJYwasrISiSLacM2bG2vnnOcqPn/CCQuAinhZv5qoiYzuVtR9Ip24+ggVY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=pgcvkbsi; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="pgcvkbsi" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=yTHalOLUmgnOoLmmCtnuWbnyzLCxCDhqZLeNdhtc+EQ=; b=pgcvkbsiN/sb/abeSWJdygSHLe LAlq87gfHKyohHUgWzMhd3z3ZOoD6JW13qZO7VER2AXxIdhNoIIzaQvaQb8q1AU8lP67+nsdr7mb1 WA1mO0Q/x4rcJj8weriQ3HLtKMhTDwwU6dMSFgwaWD9dRR9bAGGwkhLQkww0adWPfkx7RHebUzZ/t B3XYUaO05sewBVPXsGbG/Wj7OvkrBuaEcMrBYtnvdjTYiKXnQCsE7emj5hCQYXiXwux3/o2kAVNfR hr1L9D3pTNPkyJGe6FH2Fdp3Bvw27HIES/txC9lRQ7hj6KWUtk05PZjRDgukGz4Xm3l4/hdkQ6GbJ Z/4uf2xg==; Received: from willy by casper.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vcyq8-0000000BK1y-0Xwg; Tue, 06 Jan 2026 04:38:40 +0000 Date: Tue, 6 Jan 2026 04:38:39 +0000 From: Matthew Wilcox To: Ryan Roberts Cc: Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan , Uladzislau Rezki , "Vishal Moola (Oracle)" , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v1 0/2] Free contiguous order-0 pages efficiently Message-ID: References: <20260105161741.3952456-1-ryan.roberts@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260105161741.3952456-1-ryan.roberts@arm.com> On Mon, Jan 05, 2026 at 04:17:36PM +0000, Ryan Roberts wrote: > Hi All, > > A recent change to vmalloc caused some performance benchmark regressions (see > [1]). I'm attempting to fix that (and at the same time signficantly improve Unfortunately, there was no [1] ... I'm not sure this benchmark is really doing anything representative. But the performance improvement is certainly welcome; we'd deferred work on that for later.