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 433D147ACC7; Wed, 29 Jul 2026 14:14:13 +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=1785334454; cv=none; b=ru1quhbzOWVqatkFq/PfhkLuQUz1J6ewVCtlNYfY9rSd/Iksm0lceyFHTwV7p2xi05JTrbqOji1b56x//4JmvgrACCQrE60O2jXN+Hny1v192ARWM8N0qGf4LhJh+gZXwK6Qw7LD3rDdAxEG7jyGOCZlZdsg/oDDApBsddnXnes= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785334454; c=relaxed/simple; bh=K9R2xwjEk2SPXjAT1vPM8BAsvMBWXKP+4fYXXytvK2g=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=EPWC3ldsgffvzxd0bVw0q4ZhtZz6HGK7qmlw0Jv/L+ch+ZiSfwjH95pv+bpH97rzzrF4NbJow2R9ADlkZ1kEvcTbdREtBu7RgWU/Ju5kpISiwedUtrWBOD51q1fY/A5+3dBeJ+CEsIJYvCOtmzM/WuhURAz8Z4+Ts1rzJ6N8PVs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=M7N+xkVI; 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="M7N+xkVI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B28891F00A3A; Wed, 29 Jul 2026 14:14:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785334452; bh=KR+HtKGzuohI9h8IjhDmmFqiaFeXTkINifmtGZ3dgIA=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=M7N+xkVIxLiKKt6LAuXsLMfV9V43y5vkIDnSQFrycZ1pEgUQCfVqi4pWqHT8MCqNl Y/4yUHdVj6AUqgh/OnchFDCb4JWXw8pp3oTMa4xj9DV289QQpEEfyrb+5yPaSuEOMz EOGQaUz/dzzzZD6Ei5iOVfjjZPbmNwwtwkD/pRNcyQTl2ClrqCJvMXrfBr9kgtifC9 1AMBdOWUR7tmolauvZdTq/kvfLi3qxi/7mCwcqud0fldUL0C+pUHO4S7I3LLIUzM42 gWNpIsuE6vCBjg73w+FOD3weyfA0uLPopfM10hkrUuhbohNWhaLHQ6Zb8LW8EjCYRg pR3cCCp2u3rLQ== Message-ID: <5342124c-4847-4e93-92a4-f3512928c4d1@kernel.org> Date: Wed, 29 Jul 2026 16:14:05 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 0/8] mm/slab: introduce kfree_rcu_nolock() and improve slub_kunit coverage Content-Language: en-US To: "Harry Yoo (Oracle)" , Andrew Morton , Hao Li , Christoph Lameter , David Rientjes , Roman Gushchin , Alexei Starovoitov , Andrii Nakryiko , Puranjay Mohan , Amery Hung , Sebastian Andrzej Siewior , Clark Williams , Steven Rostedt , "Paul E. McKenney" , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Pedro Falcato , Suren Baghdasaryan , Shengming Hu Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-rt-devel@lists.linux.dev, rcu@vger.kernel.org, bpf@vger.kernel.org References: <20260729-kfree_rcu_nolock-v5-0-a28cdcda9673@kernel.org> 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: <20260729-kfree_rcu_nolock-v5-0-a28cdcda9673@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 7/29/26 10:20, Harry Yoo (Oracle) wrote: ... > 8: 8e69c83a1e52 ! 8: aeaf2ab60046 slub_kunit: extend the test for kfree_rcu_nolock() > @@ lib/tests/slub_kunit.c: struct test_nolock_context { > - gfp_t gfp = (i % 2) ? GFP_KERNEL : GFP_KERNEL_ACCOUNT; > + gfp_t gfp = (i & 1) ? GFP_KERNEL : GFP_KERNEL_ACCOUNT; > > - objects[j] = kmalloc_obj(*objects[j], gfp); > +- objects[j] = kmalloc(64, gfp); > ++ objects[j] = kmalloc_obj(*objects[j], gfp); > if (!objects[j]) { > + j--; > + while (j >= 0) > @@ lib/tests/slub_kunit.c: static void test_kmalloc_kfree(void) > } > } > > Link: https://lore.kernel.org/linux-mm/20260427-nolock-api-fix-v2-0-a6b83a92d9a4@kernel.org [1] > Link: https://lore.kernel.org/linux-mm/6edebc2b-5f5a-4b9c-9a4c-564310acee1b@kernel.org [2] > Acked-by: Vlastimil Babka (SUSE) > Signed-off-by: Harry Yoo (Oracle) > Link: https://lore.kernel.org/linux-mm/872bd673-3d45-4111-8a41-31185db3ece5@kernel.org > Signed-off-by: Harry Yoo (Oracle) > Link: https://lore.kernel.org/linux-mm/6811cc17-8ee4-48c8-8cbf-6bf4d9f98162@kernel.org [1] > Link: https://lore.kernel.org/linux-mm/40591888-3a87-433e-b3d2-cda1cab543be@kernel.org [2] > Suggested-by: Vlastimil Babka (SUSE) > Signed-off-by: Harry Yoo (Oracle) > Signed-off-by: Harry Yoo (Oracle) > Signed-off-by: Harry Yoo (Oracle) Wonder what produced this weird block of assorted trailers? "b4 prep --compare-to vX" never did that for me? > --- > Harry Yoo (Oracle) (8): > mm/slab, slub_kunit: register kprobe to trigger _nolock APIs > mm/slab: handle the !allow_spin case in kfree_rcu_sheaf() > mm/slab: use call_rcu() in unknown context if irqs are enabled > mm/slab: extend deferred free mechanism to handle rcu sheaves > mm/slab: allow kfree_rcu_sheaf() on PREEMPT_RT > mm/slab: introduce struct kvfree_rcu_head for kvfree_rcu batching > mm/slab: introduce kfree_rcu_nolock() > slub_kunit: extend the test for kfree_rcu_nolock() > > include/linux/rcupdate.h | 32 ++++++- > include/linux/slab.h | 16 +--- > include/linux/types.h | 8 ++ > include/trace/events/rcu.h | 2 +- > lib/tests/slub_kunit.c | 190 ++++++++++++++++++++++++++++----------- > mm/slab.h | 52 ++++++++++- > mm/slab_common.c | 81 +++++++++++++---- > mm/slub.c | 220 ++++++++++++++++++++++++++++----------------- > 8 files changed, 433 insertions(+), 168 deletions(-) Applied to slab/for-7.3/kfree_rcu_nolock and merged go slab/for-next, thanks! Used slab/for-next-fixes as a base for a better topic branch indepdencence. > --- > base-commit: ffc64805cebac330b2a60b2f1f144fcc35b8ab46 > change-id: 20260615-kfree_rcu_nolock-e5502555992f > > Best regards,