From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 489CA182D6; Wed, 1 Jul 2026 08:32:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782894771; cv=none; b=rXSX1Zr/bLRULH7z5GWKsxxPUF5z3qYsVu1khISxcTwXfvOdrBJTtmjsBGZ33ch2oyOLfvgMHwXS0b+fIzstVGPvWkclOdIRNQQIRDCbhWXDPUhH490Hv+VuOoCxgSs3RxN3gAsZmVDOLZCwZ2gVm4wQKWFHyTUDr29sCgnkTXk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782894771; c=relaxed/simple; bh=k4T0ptpwhSJri+nNHMQSHjuq6ivdec3dCrk2uEFLTf4=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=YKG97HsPWR78Urkw4iZ/vdDondKgeSi8/G1dewVOUCHs4aKUcgTkc6OWa6KUB5EAC27PD7yFma6zip2AGWYmmmpLfmTRar/YxmS7fcrJgTnS4MCTnT0jqd7/msSKS96GZiQpMyD9F8ajbNE6e7S16pLmUVV2GpP3xcMB2+cCDyM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=POofgpPt; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="POofgpPt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F9831F000E9; Wed, 1 Jul 2026 08:32:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782894769; bh=qnNgn00HPtxGEmPVZmC3ERUTFf2RhZT1SafyHKh1YXY=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=POofgpPt2nwgcX5HuD4IxNyW9cOA3TuB2pq2AICIA3gIKE/TRguRBoSlwo69Wi2VK DkFCow35wbmk1trpPJyJJ777stS8E+BCkDI089kcftpnHCtD0/SPGFj6I7+ME8JZSW A7Yd5uCa5icpRjBVOUlUBKKRu80RLgewO8fxLDtRixro6vUqkk+sySkyBnppi8e05X 91e5sM8lla7yifNTAPqyi6/k+EY4jEQmsrYyYPvAYSzmpXYT2NmD9zQFnBfDXyZVC7 /G78J1U9+6KkDkiV9r6F/0eN3yOOVnZY4OK20rmeZ02pS/+ZNUbGY8grzY2lFLJtaJ cFycaW0GmqZog== Message-ID: Date: Wed, 1 Jul 2026 10:32:42 +0200 Precedence: bulk X-Mailing-List: linux-rt-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 16/16] mm: remove the __GFP_NO_OBJ_EXT flag Content-Language: en-US To: Brendan Jackman , Andrew Morton , Suren Baghdasaryan , Michal Hocko , Johannes Weiner , Zi Yan , Muchun Song , Oscar Salvador , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Mike Rapoport , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Ying Huang , Alistair Popple , Hao Li , Christoph Lameter , David Rientjes , Roman Gushchin , Sebastian Andrzej Siewior , Clark Williams , Steven Rostedt Cc: "Harry Yoo (Oracle)" , Gregory Price , Alexei Starovoitov , Matthew Wilcox , Hao Ge , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev References: <20260629-alloc-trylock-v3-0-57bef0eadbc2@google.com> <20260629-alloc-trylock-v3-16-57bef0eadbc2@google.com> From: "Vlastimil Babka (SUSE)" Autocrypt: addr=vbabka@kernel.org; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSNWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBrZXJuZWwub3JnPsLBsAQTAQoAWhYhBKlA1DSZLC6OmRA9UCJPp+fM gqZkBQJqFFy6GxSAAAAAAAQADm1hbnUyLDIuNSsxLjEyLDIsMgIbAwUJGtCBUAULCQgHAwUV CgkICwUWAgMBAAIeBQIXgAAKCRAiT6fnzIKmZJIUEADFx/tREzUImHrEwVHeSvDFmA7tJysI UVrlvrM09E7GIuzphzv7jYmo8n3ANpCczLEVr4G0syYQdTigaZgv3+FQDIIzhKih1IHhu1Ei XHlywNWKnQxxQEUNi5Mwx43wQz5XVw9F1A7gtKBKNtfogO511hAbrzagrYajyQacEJ/+sfhZ 9Da8ltHIXD8pcYaHUfQgEusCgmEd9+KrUwrTbckFKmYq5chuE6yJ4J0EmWknL096jIE6CnzF FRslQ3B1UKDjxVsm1ZHfir5NeWszLkTvGFsddFaWTgh8UycESG6VQzKXjjewXu2pG7YQYRpj QKm1W5X2TkwWkXRBZTmfmbhxIUMh3+zf5wQ463rSmDN/8v81tdqBtAW6rH/kzg1GvkaTHXn0 507yEHFzBksk2viAuIxxr7km8+/KARYLIdGtx30EG8cKzAUZOK6WqxtNCsXUJNrVE8CWrCaD icoNu7Fs1c5hmPHdSTnU48ce67449DdnO4neLSNhRiGlMHJgfJUmgrxu/hcYeOZ3haWmEQ2w uW1Mh01OHi8QZHCEyAbABrPs9GUgccc/4eYXX9hIgxfSkYzn8f+8NuIFPWl/0uTvjgqU29FQ SbzOLxHq9439Ox40G5mS5eZXRGxITYR+6TXvRGI6P/264jvflnr/pDGUttaikU+0W+1uxgKH cmYbEc7ATQRbGTU1AQgAn0H6UrFiWcovkh6EXVcl+SeqyO6JHOPm+e9Wu0Vw+VIUvXZVUVVQ La1PQDUi6j00ChlcR66g9/V0sPIcSutacPKfdKYOBvzd4rlhL8rfrdEsQw5ApZxrA8kYZVMh FmBRKAa6wos25moTlMKpCWzTH84+WO5+ziCTsTUZASAToz3RdunTD+vQcHj0GqNTPAHK63sf bAB2I0BslZkXkY1RLb/YhuA6E7JyEd2pilZOrIuBGl/5q2qSakgnAVFWFBR/DO27JuAksYnq +aH8vI0xGvwn75KqSk4UzAkDzWSmO4ZHuahKtQgZNsMYV+PGayRBX9b9zbldzopoLBdqHc4n jQARAQABwsF8BBgBCgAmAhsMFiEEqUDUNJksLo6ZED1QIk+n58yCpmQFAmfIHFQFCRYU6J8A CgkQIk+n58yCpmS2PA//bqN1LfcotmArgElsa+0EGZSQlYgK48pm8WAeTXTngudP9IJ4SuKY HR5RNjHcBeqN+Me0zxRqYzRb8nGanHEkDyf4Im8DQM8d6vbyU+FcPmG4skud4kgS1zMHnlVd SXfSIwKC/hKgdHG8aBV7545Lz9X6Iohea+94wneD0aw/hqF+QWewGZhWJriWAZtvEkzNjQOi 4U9F/trLten/x7bpphDSnDMKJtITbtzATT1Dq7o7VpIUK1nCTQALMuMjKCdi8OdU/+V+R3O4 0PXWvX8qrvqYapVbZ+9KqT74FsuB0Ya9uXwgBF2Q6cRuETZk5vqaqKxzqoQZCO8AOz/58j6O 2RHNy/mZEN+7tJ5Tsq42zVJ4jxsT8b9YplavCMsnBgDeRWhcbYhCyttoL7nYISyWg4kQYZ/P wIV3OuNv2f8iKYsxNsRuClOAF82+gvqOy1/1pprFjy8uo2pkoOrb63aOP3vO5VHnRKgra6dq NcaZ+c6J4H+nEJGi2SkHAUJz5oBzuThvPudLvPA/SK8sKoM01IRxSihev/S/5WLazXB1PGem OCbvzC1IjWJJraxiDJ5IygokapUa2RP7+WBR22skQ3SSl6G107QgWKSyTOGWEaRmV53vxQLV jXuCmzSSasTL60zq5yGrT4/DYQVSNEUiUbG4pYekxJujNeEDkUlky0Y= In-Reply-To: <20260629-alloc-trylock-v3-16-57bef0eadbc2@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 6/29/26 15:12, Brendan Jackman wrote: > All users of the flag are converted to SLAB_ALLOC_NO_RECURSE or > ALLOC_NO_CODETAG (from __GFP_NO_CODETAG which reused the NO_OBJ_EXT bit). > Free up the flag bit. > > Signed-off-by: Vlastimil Babka (SUSE) For a correct process, there should be also a matching From: Thanks! Vlastimil > [Rebased onto __GFP_NO_CODETAG removal] > Signed-off-by: Brendan Jackman > --- > tools/include/linux/gfp_types.h | 7 ------- > 1 file changed, 7 deletions(-) > > diff --git a/tools/include/linux/gfp_types.h b/tools/include/linux/gfp_types.h > index 6c75df30a281d..a93b8bd200b76 100644 > --- a/tools/include/linux/gfp_types.h > +++ b/tools/include/linux/gfp_types.h > @@ -55,7 +55,6 @@ enum { > #ifdef CONFIG_LOCKDEP > ___GFP_NOLOCKDEP_BIT, > #endif > - ___GFP_NO_OBJ_EXT_BIT, > ___GFP_LAST_BIT > }; > > @@ -96,7 +95,6 @@ enum { > #else > #define ___GFP_NOLOCKDEP 0 > #endif > -#define ___GFP_NO_OBJ_EXT BIT(___GFP_NO_OBJ_EXT_BIT) > > /* > * Physical address zone modifiers (see linux/mmzone.h - low four bits) > @@ -137,17 +135,12 @@ enum { > * node with no fallbacks or placement policy enforcements. > * > * %__GFP_ACCOUNT causes the allocation to be accounted to kmemcg. > - * > - * %__GFP_NO_OBJ_EXT causes slab allocation to have no object extension. > - * mark_obj_codetag_empty() should be called upon freeing for objects allocated > - * with this flag to indicate that their NULL tags are expected and normal. > */ > #define __GFP_RECLAIMABLE ((__force gfp_t)___GFP_RECLAIMABLE) > #define __GFP_WRITE ((__force gfp_t)___GFP_WRITE) > #define __GFP_HARDWALL ((__force gfp_t)___GFP_HARDWALL) > #define __GFP_THISNODE ((__force gfp_t)___GFP_THISNODE) > #define __GFP_ACCOUNT ((__force gfp_t)___GFP_ACCOUNT) > -#define __GFP_NO_OBJ_EXT ((__force gfp_t)___GFP_NO_OBJ_EXT) > > /** > * DOC: Watermark modifiers >