From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792583271; b=ycRAYZTsKP94zIGxo6528bDLAlLy9vy+Q6SLsP6rbDA+Rs6z4zKfggQlilA1M8/ISzte 78mbKmsilJ7FXlyqk8T3ifq3EZ9Y8/n9V/rWhWbKsPCJ/bx1RsW0MkAHHPrk4XKwgInz4 zlGMFLoEQAvT1IQqy9Gr+LVsysuuXyz4LVthHBijCvXAfGreCQjsfcyQGtPUA5BKLD6Ip 7nfBUxSguphb/CdQxwFw6cMGNrzg6k8L5TDnh2SnT1UxP6+wyt4FkuJHiXXWS7uMuhYA5 7M+JctiXGbYhc4bhLoG7PeSHY3EPkbt0jpAncTULvnLbn85192IeHWhVRK9BfCM4o5w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792583271; h=Received:DKIM-Signature:From:Date:Subject:MIME-Version:Content-Type: Content-Transfer-Encoding:Message-Id:References:In-Reply-To:To:Cc: X-Mailer; bh=LamOgwOLGcvObJJ6uLyjNnr+OKxJmcO2SWrOkvHa4B0=; b=GURSkDRKl7d9Kc7Y9PWjh1yN2KlFgn2DyN4Xx99S40MajHPqX6o6hYBy7ge0xiGuitJG xgSCI4AUD9NPXr4qqxtZuI25xBUaCf15rFpkcJ+FbO4a5CZrwo1D0W8LEhVbi360Egx/r nX/KAZLxpWX6mA5nozQcMFLJsyibUpn47JColacCc17B+SzhZRgvRFJ0DDmSUemDbim8r eLn//b3luxpDnvYO1Wi8Lt0DtPJDSkpbuwuJO140fR4iApF5CO/jEYgqMbVK/cViQi1wS mYKh8pkHPnUvjgKerIXwG9vomq+ipfVDY7hxN5efHXpmKORD4vz7IJSwWz4Ng57/4kQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=ABx0n5+w; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 03182606A32C for ; Wed, 21 Oct 2026 11:47:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=ABx0n5+w Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F4EE1F000C4; Wed, 21 Oct 2026 11:47:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792583270; bh=LamOgwOLGcvObJJ6uLyjNnr+OKxJmcO2SWrOkvHa4B0=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=ABx0n5+wJXHhNQk6ZRp0wqw4Rw7NF+bXiYQq2SvsBPoBKUDyPS1FKlsineSsqAOud Ao6k/OkSWtjiesySf8tDYRaKmnk0uZRkpiMrIBtr1f2ZkErMR031WCq6j4RvxMdW9E TlL1ttZOyHC6ksfHTx30Mk27mlMpFbUMTGp9dAVK/qVF0j0+sTE9ckvhejDBOOP2fj g5edE9dWu6I9P5Qu8zdos9gI3ACgQlZET6Y0qNKIlglWaH78OpwE8XdhTD/l2cyU8Z uwCY+GDwkDoxGJhOXUQeOP7COA7+6xbWzdWZl02/XKQzVrtVPJcHxnP7SW1o4Rf2aG OXu998Y20Iu4g== From: "Harry Yoo (Meta)" Date: Wed, 21 Oct 2026 12:46:48 +0100 Subject: [PATCH slab/for-next 07/14] arm64/mm: specify SLAB_MAY_ACCOUNT for pgd_cache X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261021-memalloc-prof-dont-waste-slabobj-ext-metadata-v1-7-096800aa3330@kernel.org> References: <20261021-memalloc-prof-dont-waste-slabobj-ext-metadata-v1-0-096800aa3330@kernel.org> In-Reply-To: <20261021-memalloc-prof-dont-waste-slabobj-ext-metadata-v1-0-096800aa3330@kernel.org> To: Vlastimil Babka , Andrew Morton , Suren Baghdasaryan , Johannes Weiner , Michal Hocko , Shakeel Butt , Roman Gushchin Cc: Hao Li , Christoph Lameter , David Rientjes , Muchun Song , Hao Ge , Pedro Falcato , linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, "Harry Yoo (Meta)" , Catalin Marinas , Will Deacon , Mark Rutland , Anshuman Khandual , linux-arm-kernel@lists.infradead.org X-Mailer: b4 0.16.0 When PGD_SIZE != PAGE_SIZE, user PGDs are allocated from pgd_cache with GFP_PGTABLE_USER, which includes __GFP_ACCOUNT. Specify SLAB_MAY_ACCOUNT when the object may be charged to a memcg. __GFP_ACCOUNT without SLAB_MAY_ACCOUNT will not be allowed. Path (e.g. 64K pages): copy_process() -> mm_init() -> pgd_alloc() -> kmem_cache_alloc(pgd_cache, GFP_PGTABLE_USER) Assisted-by: LLM Cc: Catalin Marinas Cc: Will Deacon Cc: Mark Rutland Cc: Anshuman Khandual Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Harry Yoo (Meta) --- arch/arm64/mm/pgd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/mm/pgd.c b/arch/arm64/mm/pgd.c index bf5110b91e2f..0fd5b90b5160 100644 --- a/arch/arm64/mm/pgd.c +++ b/arch/arm64/mm/pgd.c @@ -63,5 +63,5 @@ void __init pgtable_cache_init(void) * Naturally aligned pgds required by the architecture. */ pgd_cache = kmem_cache_create("pgd_cache", PGD_SIZE, PGD_SIZE, - SLAB_PANIC, NULL); + SLAB_PANIC | SLAB_MAY_ACCOUNT, NULL); } -- 2.54.0