From nobody Tue Feb 10 08:27:08 2026 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.223.131]) (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 31B8A14264A for ; Fri, 23 Feb 2024 18:27:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.135.223.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708712863; cv=none; b=OHVjY/povfi7md8mPLBDenz0o5bV0rUOpQ7Uf1Md+64afR5vw9N5FThrrNmmQnCLL0R1FVuRhL0a6vHPVHFCoR7HmiFSYhmDI7Al6KIIlpz+qkZlvmYAx9v9/2WVlGXCxh8c64XFjtQ7s9s4xCqgHQnXqXH+2dxL+gF5vHT95uQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708712863; c=relaxed/simple; bh=xj2FbXNZUF1ZX1Yi4h91pRFSVKXZaW8ItJyLfGmRRuU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=DyIr9fQh3GtFbQHC1567sF5XltmO7Cx5kZAHrayC1Q6xnUFQ0BN7tHPrGA7fk5MHzSO0MeMb14bjrjSE7DpAjIdYkp36zLRf2UcUCEMttNKKjAsEz7no4iHtXFtRwSUBU4OPb3chM9X5gA64RlcM9zWSOx8u4kanRi2fTkJpIFs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz; spf=pass smtp.mailfrom=suse.cz; dkim=pass (1024-bit key) header.d=suse.cz header.i=@suse.cz header.b=Qd8LsPfV; dkim=permerror (0-bit key) header.d=suse.cz header.i=@suse.cz header.b=nMZra/aK; dkim=pass (1024-bit key) header.d=suse.cz header.i=@suse.cz header.b=Qd8LsPfV; dkim=permerror (0-bit key) header.d=suse.cz header.i=@suse.cz header.b=nMZra/aK; arc=none smtp.client-ip=195.135.223.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=suse.cz Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.cz Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=suse.cz header.i=@suse.cz header.b="Qd8LsPfV"; dkim=permerror (0-bit key) header.d=suse.cz header.i=@suse.cz header.b="nMZra/aK"; dkim=pass (1024-bit key) header.d=suse.cz header.i=@suse.cz header.b="Qd8LsPfV"; dkim=permerror (0-bit key) header.d=suse.cz header.i=@suse.cz header.b="nMZra/aK" Received: from imap1.dmz-prg2.suse.org (imap1.dmz-prg2.suse.org [10.150.64.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 28A201FC2A; Fri, 23 Feb 2024 18:27:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1708712859; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7brqYZxmuxrRKSYQEeacefCe+ctYuF6xWTXM5McbA8I=; b=Qd8LsPfVNYRjMhedMtLQ9mEmCVsypU2uQh2vZjA/HgXPPaDR8h6Ob8cd8kWmdHVkIEyWc5 tZICMKAYYO83n5ZTXm+kGImHl31S91luqmF99uGMQrY23pYLrC8FYIbz+5qVyYmtbNCrKw Ow1WIWaUaW6G1ZKB3a3lruEOoFTS/EA= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1708712859; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7brqYZxmuxrRKSYQEeacefCe+ctYuF6xWTXM5McbA8I=; b=nMZra/aKnnlj9lkcc3nn6p3CDtjcpzXA6pWZ7RKjeB9Du6opgh5HJm8+D3P0y4LF8SXZOz FXDZgr9xc/wiCJCA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1708712859; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7brqYZxmuxrRKSYQEeacefCe+ctYuF6xWTXM5McbA8I=; b=Qd8LsPfVNYRjMhedMtLQ9mEmCVsypU2uQh2vZjA/HgXPPaDR8h6Ob8cd8kWmdHVkIEyWc5 tZICMKAYYO83n5ZTXm+kGImHl31S91luqmF99uGMQrY23pYLrC8FYIbz+5qVyYmtbNCrKw Ow1WIWaUaW6G1ZKB3a3lruEOoFTS/EA= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1708712859; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7brqYZxmuxrRKSYQEeacefCe+ctYuF6xWTXM5McbA8I=; b=nMZra/aKnnlj9lkcc3nn6p3CDtjcpzXA6pWZ7RKjeB9Du6opgh5HJm8+D3P0y4LF8SXZOz FXDZgr9xc/wiCJCA== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 008AE13AC1; Fri, 23 Feb 2024 18:27:38 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id gJluO5rj2GUaTQAAD6G6ig (envelope-from ); Fri, 23 Feb 2024 18:27:38 +0000 From: Vlastimil Babka Date: Fri, 23 Feb 2024 19:27:17 +0100 Subject: [PATCH v2 1/3] mm, slab: deprecate SLAB_MEM_SPREAD flag 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="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240223-slab-cleanup-flags-v2-1-02f1753e8303@suse.cz> References: <20240223-slab-cleanup-flags-v2-0-02f1753e8303@suse.cz> In-Reply-To: <20240223-slab-cleanup-flags-v2-0-02f1753e8303@suse.cz> To: Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , Andrew Morton , Roman Gushchin , Hyeonggon Yoo <42.hyeyoo@gmail.com>, Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino Cc: Zheng Yejian , Xiongwei Song , Chengming Zhou , linux-mm@kvack.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Vlastimil Babka , Steven Rostedt X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1937; i=vbabka@suse.cz; h=from:subject:message-id; bh=xj2FbXNZUF1ZX1Yi4h91pRFSVKXZaW8ItJyLfGmRRuU=; b=owEBbQGS/pANAwAIAbvgsHXSRYiaAcsmYgBl2OOSfAZ6NhpOQjvkRl542eUJ71NZdn+YC7Mu6 stXO0E2hXKJATMEAAEIAB0WIQR7u8hBFZkjSJZITfG74LB10kWImgUCZdjjkgAKCRC74LB10kWI mib0CACG+JmJHKxWWP/7G2u05sgQbj5Lct25lOvrv1QuCza7ZVTLPiTE2iE+BTE0PtH2dbdAYA5 sl5xS/B71qhL1xjxpXhlT48vuelChx7oiMjOTPC1tbcKaU3HM68z420oR4LMO374DAlIaO5zlXu 3UBG5MbidRfJxcqpQ8bWT8BUApwBuLjP1/psufGw7UGhM8uOii58OmE81DqIaPf9+9L0upk6xw9 TNwRePi/w3rAJw42PoL6BkGJktvFbYpMLsDlfcPtjayFWVLix+Fwxkw09xUv4ZmAHSNjBDIMLjm HUnykdE/UgcYH0yBCAYi+6kvrVWPQw9wvQU/PWokxe3J3Ive X-Developer-Key: i=vbabka@suse.cz; a=openpgp; fpr=A940D434992C2E8E99103D50224FA7E7CC82A664 Authentication-Results: smtp-out2.suse.de; none X-Spamd-Result: default: False [1.40 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TAGGED_RCPT(0.00)[]; MIME_GOOD(-0.10)[text/plain]; BAYES_HAM(-0.00)[42.50%]; R_RATELIMIT(0.00)[to_ip_from(RLqdadssyy1w6u3twx3pq4jyny)]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; RCPT_COUNT_TWELVE(0.00)[20]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.cz:email]; FREEMAIL_TO(0.00)[linux.com,kernel.org,google.com,lge.com,linux-foundation.org,linux.dev,gmail.com,arm.com]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[]; SUSPICIOUS_RECIPS(1.50)[] X-Spam-Level: * X-Spam-Score: 1.40 X-Spam-Flag: NO The SLAB_MEM_SPREAD flag used to be implemented in SLAB, which was removed. SLUB instead relies on the page allocator's NUMA policies. Change the flag's value to 0 to free up the value it had, and mark it for full removal once all users are gone. Reported-by: Steven Rostedt Closes: https://lore.kernel.org/all/20240131172027.10f64405@gandalf.local.h= ome/ Reviewed-and-tested-by: Xiongwei Song Reviewed-by: Chengming Zhou Reviewed-by: Roman Gushchin Signed-off-by: Vlastimil Babka Acked-by: David Rientjes --- include/linux/slab.h | 5 +++-- mm/slab.h | 1 - 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/include/linux/slab.h b/include/linux/slab.h index b5f5ee8308d0..b1675ff6b904 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -96,8 +96,6 @@ */ /* Defer freeing slabs to RCU */ #define SLAB_TYPESAFE_BY_RCU ((slab_flags_t __force)0x00080000U) -/* Spread some memory over cpuset */ -#define SLAB_MEM_SPREAD ((slab_flags_t __force)0x00100000U) /* Trace allocations and frees */ #define SLAB_TRACE ((slab_flags_t __force)0x00200000U) =20 @@ -164,6 +162,9 @@ #endif #define SLAB_TEMPORARY SLAB_RECLAIM_ACCOUNT /* Objects are short-lived */ =20 +/* Obsolete unused flag, to be removed */ +#define SLAB_MEM_SPREAD ((slab_flags_t __force)0U) + /* * ZERO_SIZE_PTR will be returned for zero sized kmalloc requests. * diff --git a/mm/slab.h b/mm/slab.h index 54deeb0428c6..f4534eefb35d 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -469,7 +469,6 @@ static inline bool is_kmalloc_cache(struct kmem_cache *= s) SLAB_STORE_USER | \ SLAB_TRACE | \ SLAB_CONSISTENCY_CHECKS | \ - SLAB_MEM_SPREAD | \ SLAB_NOLEAKTRACE | \ SLAB_RECLAIM_ACCOUNT | \ SLAB_TEMPORARY | \ --=20 2.43.2