From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f197.google.com (mail-pg1-f197.google.com [209.85.215.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 91D183F413E for ; Thu, 23 Jul 2026 07:50:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784793013; cv=none; b=YMADjnAmYHL8QhQhD3H9Lak5hVPCayFZuytpa0Vssp9NBM5C6ljCWoram0T4LV/WzfvzW/OnwJ0bGmxRi+zSaAHBJbpj46Q6/cF1ke7Je80Bog0/rbNr0Nb6imAFvDBlCdg6QGSiTUl9DGtu5klPaZ44k58zfSd5WNw7hYC1InM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784793013; c=relaxed/simple; bh=u2fUOQuGIzEu0LzPVl8D8L8TAak1Ws7TcavgU3xXKTw=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=RyrVpIEEkPQLTRmFj1TuF0HDmDeEokqKaPTBq8fsGrUqY2SCXUe7jBzPV2MFgem6mhmPSsAkNzhXty8Ib6nbrq9fO9Y/S0pmzVb3zImeaoZ43Bzas9r2Ajugi610KzQ1oyic11QHG/nDGJHH3LlBj3M0pcuW+yOIwXbLRTk1iuU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--jyescas.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=g3KxhVnn; arc=none smtp.client-ip=209.85.215.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--jyescas.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="g3KxhVnn" Received: by mail-pg1-f197.google.com with SMTP id 41be03b00d2f7-cab041eced3so653340a12.1 for ; Thu, 23 Jul 2026 00:50:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1784793012; x=1785397812; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=41Xn4kxvg4d2m5A/f17AABWitCrv11SosQfQDkutcgo=; b=g3KxhVnn/xWhynPDpECmDhw6OSKTUNZZPHDyXLSRaAiDZ+u1jxkY8A+/GdLWkXHUQ0 ydPY/VCbzvSK602Xb5AWg8379J0B1sHi+2tsNzRqLblHB8CtIqcGmb/2xnOTGYIfYxhC Wunnufd0SWFGPm1p5dhZkp5XbRLwwAbIpEokGlAjtm/BlcCZpZ7gBa8IEhAP03vXmTq/ NzYsqHSsC+XnfqFGhCHesAUtYtwSfFMHS2TLI/XXEEW8Sap5o3ZV0Yobl1J7+siv0oGD 9Y39ltDXbog6yM2iJq2WPgYcCWDeNyzGWOBICtn6/9rxhBZOTILChjkxCFKfPT/GeoCM B8Uw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784793012; x=1785397812; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=41Xn4kxvg4d2m5A/f17AABWitCrv11SosQfQDkutcgo=; b=P6uTTqD7GDTn19MxMF9w8WJLI1PsS95Spcs1PeTIzP6MXUM00NO1qYyWYRXsjtegix R+m6zCdcv2JRpVgJ0KZ9l7wmjA2XDnOOTKWLoYwBZXj9Y+VpJm+2hgeBa9IRyDptHbA8 doTH8aIbIZlUIx1hED4pL3kDrObYocYgl7GLx7nj0b1BAEpz9marhw42HiKs2SD3KC3E m+PtBJuUkNPqECfWb+GuHnz9PdSuHN5nfFIW2gXK33G4ETq19VkJaD+L3NdDzIOYs15E b7yS1rxJ46dctRWq/omOqWljg+nueVZlFOicdzi9Z5v7/Xx5/ESqScDWPBKbgd9Qk7dx R7pw== X-Forwarded-Encrypted: i=1; AHgh+Rr+iwxq7+NYZRJiodXEvB06ptvFSdcmcw6+7y29qh11xjTC6CIqXM1w3wtmsONVPniNbLYxNPBtCY3CKJs=@vger.kernel.org X-Gm-Message-State: AOJu0YwQ0UE4KqhTE5OXiFuGb9hWt/gXifg7VCcyF9dZ5vwsmO+e6D8O cbwkZKzEW3mXR60FKCsx4WozXn8qwV+JV+32WK3ZMGonTkmKFPE1hb14HmK0aPNPl4kawxQbDOV 3yAuiSNpkFA== X-Received: from dldyq11-n2.prod.google.com ([2002:a05:701b:454b:20b0:13b:a1b5:d4c1]) (user=jyescas job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a21:2d42:b0:3bf:a0e5:99a5 with SMTP id adf61e73a8af0-3c44b191b26mr2284095637.47.1784793011546; Thu, 23 Jul 2026 00:50:11 -0700 (PDT) Date: Thu, 23 Jul 2026 00:47:11 -0700 In-Reply-To: <20260723074854.1013941-1-jyescas@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260723074854.1013941-1-jyescas@google.com> X-Mailer: git-send-email 2.55.0.229.g6434b31f56-goog Message-ID: <20260723074854.1013941-8-jyescas@google.com> Subject: [RFC PATCH 07/16] mm: Define function to create a dir for each migrate type From: Juan Yescas To: Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , open list , "open list:MEMORY MANAGEMENT - CORE" Cc: jyescas@google.com, android-mm@google.com, fvdl@google.com, tkjos@google.com, minchan@google.com, dskiba@google.com, open list , "open list:MEMORY MANAGEMENT - CORE" Content-Type: text/plain; charset="UTF-8" This change creates a directory for each migrate type inside the order directory. This function won't create a directory for MIGRATE_ISOLATE due they can't be allocated using the Buddy Allocator. Note: The MIGRATE_CMA directory won't be created yet. It will be supported in the future. Signed-off-by: Juan Yescas --- mm/page_alloc_hogger.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/mm/page_alloc_hogger.c b/mm/page_alloc_hogger.c index de86b8526338..a727c4f48ffb 100644 --- a/mm/page_alloc_hogger.c +++ b/mm/page_alloc_hogger.c @@ -127,6 +127,37 @@ struct page_alloc { struct kmem_cache *req_alloc_cache; struct kmem_cache *page_alloc_cache; +/** + * create_migrate_type_subdirs() - Creates a directory for each migrate type + * inside the order directory. Once the migrate type directory is created, it + * creates the "nr_allocs" file and the "free" file. + */ +static inline int create_migrate_type_subdirs(struct dentry *orderdir, + int node_idx, int zone_idx, + int order) +{ + struct dentry *migratedir; + char dirname[24]; + + for (int mtype = 0; mtype < MIGRATE_TYPES; mtype++) { +#ifdef CONFIG_CMA + if (mtype == MIGRATE_CMA) /* CMA allocs are not supported yet*/ + continue; +#endif +#ifdef CONFIG_MEMORY_ISOLATION + if (mtype == MIGRATE_ISOLATE) /* can't allocate from here */ + continue; +#endif + snprintf(dirname, sizeof(dirname), "migrate-%s", + migratetype_names[mtype]); + migratedir = debugfs_create_dir(dirname, orderdir); + if (IS_ERR(migratedir)) + return PTR_ERR(migratedir); + } + + return 0; +} + /** * create_page_orders_subdirs() - Creates a directory for each page order inside * the zone directory. Once that the page order directory is created, it creates @@ -138,12 +169,18 @@ static inline int create_page_orders_subdirs(struct dentry *zonedir, { struct dentry *orderdir; char dirname[12]; + int ret; for (int order = 0; order < NR_PAGE_ORDERS; order++) { snprintf(dirname, sizeof(dirname), "order-%d", order); orderdir = debugfs_create_dir(dirname, zonedir); if (IS_ERR(orderdir)) return PTR_ERR(orderdir); + + ret = create_migrate_type_subdirs(orderdir, node_idx, zone_idx, + order); + if (ret) + return ret; } return 0; -- 2.55.0.229.g6434b31f56-goog