From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f73.google.com (mail-wm1-f73.google.com [209.85.128.73]) (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 65E0F427A06 for ; Wed, 13 May 2026 12:35:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778675721; cv=none; b=qxgKnW2zOnLn0qxrLvw4cCo+ZljiKrtYPE44Pi5AJu2cZEl4n1cYmo8gPxxUJaIfxiq0DgtK+x0gJR1LZJzydGAmNgwNYtFLsIGoWdLSwKFgO8TW7fYvjzE5Axv9/GXiT3qrjDt1NqpclZblzaMzWYTWejOu1TfLNhYsA+SOrVA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778675721; c=relaxed/simple; bh=6oBZEPvbhbq0m4/sCOO1SmKKtanv3Zg0HUty27Kvidk=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=UmE9T4CoUou+uh8uE69mkDq0nfpL7+3ISYpCrvqxMZYgC5os80viqyM+7X+AwAm6D/CqQsPU8gN8L8uxLXTk9VrUXBU0fL7wV1cSn7ynsuvr1ZYKlTrJXyzESplblr/eiF70A47szjUw4RFR09Js9am8WfQwJiTOWktoAaVhi2g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--jackmanb.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=b/i59tdZ; arc=none smtp.client-ip=209.85.128.73 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--jackmanb.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="b/i59tdZ" Received: by mail-wm1-f73.google.com with SMTP id 5b1f17b1804b1-48fc9084562so12239395e9.0 for ; Wed, 13 May 2026 05:35:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1778675719; x=1779280519; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=QLzi6slHGxfhu4Y8NlwXvD2GZX7MC6Ih+pKGkr9pVTY=; b=b/i59tdZQRofgZu2NK7bQsHu/OS164z0IkSbBIXtTZeYY5QiRYnWaHppswrlT73Nop ucgq/aGXGt5H/ghh3Y1aQ+HoCJpLpzW9d4PeIwrkAkv7FKJkpjD/xHW9JpFBBcS/DmWR /QzIV/zMtORyrjZ8SNNco6qha124vptNImAVpDvmztwI7LxAX2E2T8+XNEznUupgXIGf XNk0yotBWODdW9gftAVzOD5IzExQN2zsfg4Tq4+fx2BqBUgGAUTuk6ZVjNotCVXd52DX i88rGx9+lgt4bG4R5RKs3+9LCL6uzyXZ/jLC+11vnNyhluj0SHEaBTpjiT0sA88g1q8y uAxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778675719; x=1779280519; h=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; bh=QLzi6slHGxfhu4Y8NlwXvD2GZX7MC6Ih+pKGkr9pVTY=; b=ERaBRUY2yXrqHy4TnAX/ImfZhGLXyAfzbNUSmagkC7jEHn5wU0c8LzfISXJsajaabQ vHKRySyMZhaXthIPHZ4cNyHp2aEazPP573lZEeUn3YjvWQXcAA8efvZCNrkfw+AXjgTq 6y87wR6jsloQLzqix3xKOHP/a6XPtx54I2Uig8VRufwvnHqewIUKn7PVokBsJO/XalDY 67ZSx/MuUUv5Yhj8+uHVTQquvuu+twj4AprWEWIuxHwxKzrY8eDzG84PeONiZT/PX5Pi 09Q0Hz6Pm+LjgNL5RrcRsNieAKH12aDZ9PKXTYHez4GsODn7R3gTqI6dxXu807AZTdlE LEJA== X-Forwarded-Encrypted: i=1; AFNElJ9u9icEu3mtrqEOwmibnr7et6lHZlBx/wzLa4nMtn/FDTnrEZzxnD4hhhokdR3ORKoSuu6FAg2IqGz16c0=@vger.kernel.org X-Gm-Message-State: AOJu0Yyaxfg8mgmz/20alnA69IkED1no63PwuQCH2Q+mlb3MYBY9yAv0 z80WSOInoEV9FT0wrF/kvHmb98/4s7mEdHfShJkpdIY40lCmYobp6HfxiQY0bo7MjK4tL+td4Gt cvYY5uxbSR5BkIQ== X-Received: from wmbjd23.prod.google.com ([2002:a05:600c:68d7:b0:48a:5e23:da86]) (user=jackmanb job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600d:1c:b0:48e:526e:1012 with SMTP id 5b1f17b1804b1-48fce99dc29mr26844625e9.5.1778675718495; Wed, 13 May 2026 05:35:18 -0700 (PDT) Date: Wed, 13 May 2026 12:35:15 +0000 In-Reply-To: <20260513-page_alloc-unmapped-prep-v1-0-dacdf5402be8@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260513-page_alloc-unmapped-prep-v1-0-dacdf5402be8@google.com> X-Mailer: b4 0.14.2 Message-ID: <20260513-page_alloc-unmapped-prep-v1-3-dacdf5402be8@google.com> Subject: [PATCH 3/4] mm: rejig pageblock mask definitions From: Brendan Jackman To: Andrew Morton , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , "Rafael J. Wysocki" , Pavel Machek , Len Brown , Johannes Weiner , Zi Yan Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Brendan Jackman Content-Type: text/plain; charset="utf-8" - Add a PAGEBLOCK_ prefix to the names to avoid polluting the "global namespace" too much. - This new prefix makes MIGRATETYPE_AND_ISO_MASK look pretty long. Well, that global mask only exists for quite a specific purpose, and is quite a weird thing to have a name for anyway. So drop it and take advantage of the newly-defined PAGEBLOCK_ISO_MASK. Reviewed-by: Vlastimil Babka (SUSE) Signed-off-by: Brendan Jackman --- include/linux/pageblock-flags.h | 6 +++--- mm/page_alloc.c | 18 +++++++++--------- 2 files changed, 12 insertions(+), 12 deletions(-) diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h index e046278a01fa8c37d898df94114d088933b6747f..9a6c3ea17684d821fde9ec272b0802dfb78249a9 100644 --- a/include/linux/pageblock-flags.h +++ b/include/linux/pageblock-flags.h @@ -36,12 +36,12 @@ enum pageblock_bits { #define NR_PAGEBLOCK_BITS (roundup_pow_of_two(__NR_PAGEBLOCK_BITS)) -#define MIGRATETYPE_MASK (BIT(PB_migrate_0)|BIT(PB_migrate_1)|BIT(PB_migrate_2)) +#define PAGEBLOCK_MIGRATETYPE_MASK (BIT(PB_migrate_0)|BIT(PB_migrate_1)|BIT(PB_migrate_2)) #ifdef CONFIG_MEMORY_ISOLATION -#define MIGRATETYPE_AND_ISO_MASK (MIGRATETYPE_MASK | BIT(PB_migrate_isolate)) +#define PAGEBLOCK_ISO_MASK BIT(PB_migrate_isolate) #else -#define MIGRATETYPE_AND_ISO_MASK MIGRATETYPE_MASK +#define PAGEBLOCK_ISO_MASK 0 #endif #if defined(CONFIG_HUGETLB_PAGE) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 91d83c967bd478982e0161a99d47d3a76bd89992..5d6144c8860ed10fd641184f389c4953465d5178 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -364,7 +364,7 @@ get_pfnblock_bitmap_bitidx(const struct page *page, unsigned long pfn, #else BUILD_BUG_ON(NR_PAGEBLOCK_BITS != 4); #endif - BUILD_BUG_ON(__MIGRATE_TYPE_END > MIGRATETYPE_MASK); + BUILD_BUG_ON(__MIGRATE_TYPE_END > PAGEBLOCK_MIGRATETYPE_MASK); VM_BUG_ON_PAGE(!zone_spans_pfn(page_zone(page), pfn), page); bitmap = get_pageblock_bitmap(page, pfn); @@ -437,7 +437,7 @@ bool get_pfnblock_bit(const struct page *page, unsigned long pfn, __always_inline enum migratetype get_pfnblock_migratetype(const struct page *page, unsigned long pfn) { - unsigned long mask = MIGRATETYPE_AND_ISO_MASK; + unsigned long mask = PAGEBLOCK_MIGRATETYPE_MASK | PAGEBLOCK_ISO_MASK; unsigned long flags; flags = __get_pfnblock_flags_mask(page, pfn, mask); @@ -446,7 +446,7 @@ get_pfnblock_migratetype(const struct page *page, unsigned long pfn) if (flags & BIT(PB_migrate_isolate)) return MIGRATE_ISOLATE; #endif - return flags & MIGRATETYPE_MASK; + return flags & PAGEBLOCK_MIGRATETYPE_MASK; } /** @@ -534,11 +534,11 @@ static void set_pageblock_migratetype(struct page *page, } VM_WARN_ONCE(get_pageblock_isolate(page), "Use clear_pageblock_isolate() to unisolate pageblock"); - /* MIGRATETYPE_AND_ISO_MASK clears PB_migrate_isolate if it is set */ + /* PAGEBLOCK_ISO_MASK clears PB_migrate_isolate if it is set */ #endif __set_pfnblock_flags_mask(page, page_to_pfn(page), (unsigned long)migratetype, - MIGRATETYPE_AND_ISO_MASK); + PAGEBLOCK_MIGRATETYPE_MASK | PAGEBLOCK_ISO_MASK); } void __meminit init_pageblock_migratetype(struct page *page, @@ -564,7 +564,7 @@ void __meminit init_pageblock_migratetype(struct page *page, flags |= BIT(PB_migrate_isolate); #endif __set_pfnblock_flags_mask(page, page_to_pfn(page), flags, - MIGRATETYPE_AND_ISO_MASK); + PAGEBLOCK_MIGRATETYPE_MASK | PAGEBLOCK_ISO_MASK); } #ifdef CONFIG_DEBUG_VM @@ -2130,15 +2130,15 @@ static bool __move_freepages_block_isolate(struct zone *zone, } move: - /* Use MIGRATETYPE_MASK to get non-isolate migratetype */ + /* Use PAGEBLOCK_MIGRATETYPE_MASK to get non-isolate migratetype */ if (isolate) { from_mt = __get_pfnblock_flags_mask(page, page_to_pfn(page), - MIGRATETYPE_MASK); + PAGEBLOCK_MIGRATETYPE_MASK); to_mt = MIGRATE_ISOLATE; } else { from_mt = MIGRATE_ISOLATE; to_mt = __get_pfnblock_flags_mask(page, page_to_pfn(page), - MIGRATETYPE_MASK); + PAGEBLOCK_MIGRATETYPE_MASK); } __move_freepages_block(zone, start_pfn, from_mt, to_mt); -- 2.51.2