From mboxrd@z Thu Jan 1 00:00:00 1970 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 02D462564; Wed, 2 Oct 2024 10:26:34 +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=1727864797; cv=none; b=boflfhP4Pm8aDCC1xYHNjsEpAGIMxj/0VyFlz/Os7m3NlMh3uIBVeuGoKK3V6LBI6Z/MbRzQTidpOnhfdZaJX6gFkuPrU4P6xchlFa3OnC7OXYYCsTx/s5FRVomyQmQlowLTxASZFFzF4q7LtqHou8vawoV0FmyUmXohZYQHTqY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727864797; c=relaxed/simple; bh=yOaoxJMVmNsnw32EFtdnzzpiTusgvtyyoSVfzuJO1bA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=tEastlFb9+4Cc+zW8PYAYsZobWWL8JmZPmGRj/I9fDvKbW+EcT+CtwwiWXoy90ZzW0XCunyzWmZtoAVQrv3iuIW/NXEhi6WUi45jQeq+46ZhamG6OLXUWsMBZUqaJV4xri5xzAPeB9YiwpFCC/ZHHo9iaSPLonn0MvrZeMilYPA= 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=tzDfN0CR; dkim=permerror (0-bit key) header.d=suse.cz header.i=@suse.cz header.b=a1WomHnh; dkim=pass (1024-bit key) header.d=suse.cz header.i=@suse.cz header.b=tzDfN0CR; dkim=permerror (0-bit key) header.d=suse.cz header.i=@suse.cz header.b=a1WomHnh; 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="tzDfN0CR"; dkim=permerror (0-bit key) header.d=suse.cz header.i=@suse.cz header.b="a1WomHnh"; dkim=pass (1024-bit key) header.d=suse.cz header.i=@suse.cz header.b="tzDfN0CR"; dkim=permerror (0-bit key) header.d=suse.cz header.i=@suse.cz header.b="a1WomHnh" Received: from imap1.dmz-prg2.suse.org (imap1.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:97]) (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 0FAB71FD49; Wed, 2 Oct 2024 10:26:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1727864793; 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:autocrypt:autocrypt; bh=8wpNEENVwFj1K0orUvPrsefE82eun3cy9AkEFnKhTvY=; b=tzDfN0CRvh0RSoQv9B722FeqajrwpxdSKJR03d3Sbg4D++35wXOftr+X3WwFCGx/znZ7fI 9haF0PifmPbhIyqgYPySEq5kd5hOC484lZ0vM4bINkzUKv1maItoiFzBd/ZKHE8LZpZf+e 8Aeftw0JPTA8KCeZFTn40df+DtyYJ0Q= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1727864793; 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:autocrypt:autocrypt; bh=8wpNEENVwFj1K0orUvPrsefE82eun3cy9AkEFnKhTvY=; b=a1WomHnhUjGCqP8uLwaln827gSiabs5jKhCPOzRQW/FyHgvvtQ6JDIGT6+8jVvO0sojLYH LSdlX6W+YS3bT+Cw== Authentication-Results: smtp-out2.suse.de; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=tzDfN0CR; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=a1WomHnh DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1727864793; 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:autocrypt:autocrypt; bh=8wpNEENVwFj1K0orUvPrsefE82eun3cy9AkEFnKhTvY=; b=tzDfN0CRvh0RSoQv9B722FeqajrwpxdSKJR03d3Sbg4D++35wXOftr+X3WwFCGx/znZ7fI 9haF0PifmPbhIyqgYPySEq5kd5hOC484lZ0vM4bINkzUKv1maItoiFzBd/ZKHE8LZpZf+e 8Aeftw0JPTA8KCeZFTn40df+DtyYJ0Q= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1727864793; 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:autocrypt:autocrypt; bh=8wpNEENVwFj1K0orUvPrsefE82eun3cy9AkEFnKhTvY=; b=a1WomHnhUjGCqP8uLwaln827gSiabs5jKhCPOzRQW/FyHgvvtQ6JDIGT6+8jVvO0sojLYH LSdlX6W+YS3bT+Cw== 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 DE66B13974; Wed, 2 Oct 2024 10:26:32 +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 YD4ANtgf/WZ4YQAAD6G6ig (envelope-from ); Wed, 02 Oct 2024 10:26:32 +0000 Message-ID: <80d0cd70-c00a-475c-a028-e842fb86403b@suse.cz> Date: Wed, 2 Oct 2024 12:26:32 +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 slab hotfixes v2 2/2] slub/kunit: skip test_kfree_rcu when the slub kunit test is built-in Content-Language: en-US To: Guenter Roeck , Christoph Lameter , David Rientjes Cc: Roman Gushchin , Andrew Morton , Hyeonggon Yoo <42.hyeyoo@gmail.com>, linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Paul E. McKenney" , Boqun Feng , Uladzislau Rezki , rcu@vger.kernel.org, David Gow , Rae Moar , linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, Brendan Higgins References: <20241001-b4-slub-kunit-fix-v2-0-2d995d3ecb49@suse.cz> <20241001-b4-slub-kunit-fix-v2-2-2d995d3ecb49@suse.cz> From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; 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 BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSBWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmN6PsLBlAQTAQoAPgIbAwULCQgHAwUVCgkICwUWAgMBAAIe AQIXgBYhBKlA1DSZLC6OmRA9UCJPp+fMgqZkBQJkBREIBQkRadznAAoJECJPp+fMgqZkNxIQ ALZRqwdUGzqL2aeSavbum/VF/+td+nZfuH0xeWiO2w8mG0+nPd5j9ujYeHcUP1edE7uQrjOC Gs9sm8+W1xYnbClMJTsXiAV88D2btFUdU1mCXURAL9wWZ8Jsmz5ZH2V6AUszvNezsS/VIT87 AmTtj31TLDGwdxaZTSYLwAOOOtyqafOEq+gJB30RxTRE3h3G1zpO7OM9K6ysLdAlwAGYWgJJ V4JqGsQ/lyEtxxFpUCjb5Pztp7cQxhlkil0oBYHkudiG8j1U3DG8iC6rnB4yJaLphKx57NuQ PIY0Bccg+r9gIQ4XeSK2PQhdXdy3UWBr913ZQ9AI2usid3s5vabo4iBvpJNFLgUmxFnr73SJ KsRh/2OBsg1XXF/wRQGBO9vRuJUAbnaIVcmGOUogdBVS9Sun/Sy4GNA++KtFZK95U7J417/J Hub2xV6Ehc7UGW6fIvIQmzJ3zaTEfuriU1P8ayfddrAgZb25JnOW7L1zdYL8rXiezOyYZ8Fm ZyXjzWdO0RpxcUEp6GsJr11Bc4F3aae9OZtwtLL/jxc7y6pUugB00PodgnQ6CMcfR/HjXlae h2VS3zl9+tQWHu6s1R58t5BuMS2FNA58wU/IazImc/ZQA+slDBfhRDGYlExjg19UXWe/gMcl De3P1kxYPgZdGE2eZpRLIbt+rYnqQKy8UxlszsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZAUSmwUJDK5EZgAKCRAiT6fnzIKmZOJGEACOKABgo9wJXsbWhGWYO7mD 8R8mUyJHqbvaz+yTLnvRwfe/VwafFfDMx5GYVYzMY9TWpA8psFTKTUIIQmx2scYsRBUwm5VI EurRWKqENcDRjyo+ol59j0FViYysjQQeobXBDDE31t5SBg++veI6tXfpco/UiKEsDswL1WAr tEAZaruo7254TyH+gydURl2wJuzo/aZ7Y7PpqaODbYv727Dvm5eX64HCyyAH0s6sOCyGF5/p eIhrOn24oBf67KtdAN3H9JoFNUVTYJc1VJU3R1JtVdgwEdr+NEciEfYl0O19VpLE/PZxP4wX PWnhf5WjdoNI1Xec+RcJ5p/pSel0jnvBX8L2cmniYnmI883NhtGZsEWj++wyKiS4NranDFlA HdDM3b4lUth1pTtABKQ1YuTvehj7EfoWD3bv9kuGZGPrAeFNiHPdOT7DaXKeHpW9homgtBxj 8aX/UkSvEGJKUEbFL9cVa5tzyialGkSiZJNkWgeHe+jEcfRT6pJZOJidSCdzvJpbdJmm+eED w9XOLH1IIWh7RURU7G1iOfEfmImFeC3cbbS73LQEFGe1urxvIH5K/7vX+FkNcr9ujwWuPE9b 1C2o4i/yZPLXIVy387EjA6GZMqvQUFuSTs/GeBcv0NjIQi8867H3uLjz+mQy63fAitsDwLmR EP+ylKVEKb0Q2A== In-Reply-To: <20241001-b4-slub-kunit-fix-v2-2-2d995d3ecb49@suse.cz> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 0FAB71FD49 X-Spam-Level: X-Spamd-Result: default: False [-3.01 / 50.00]; BAYES_HAM(-3.00)[100.00%]; SUSPICIOUS_RECIPS(1.50)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; TAGGED_RCPT(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; FUZZY_BLOCKED(0.00)[rspamd.com]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCPT_COUNT_TWELVE(0.00)[17]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; FROM_HAS_DN(0.00)[]; FREEMAIL_CC(0.00)[linux.dev,linux-foundation.org,gmail.com,vger.kernel.org,kvack.org,kernel.org,google.com,googlegroups.com]; TO_DN_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.cz:email,suse.cz:dkim,suse.cz:mid]; RCVD_COUNT_TWO(0.00)[2]; DKIM_TRACE(0.00)[suse.cz:+] X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Action: no action X-Spam-Score: -3.01 X-Spam-Flag: NO On 10/1/24 18:20, Vlastimil Babka wrote: > Guenter Roeck reports that the new slub kunit tests added by commit > 4e1c44b3db79 ("kunit, slub: add test_kfree_rcu() and > test_leak_destroy()") cause a lockup on boot on several architectures > when the kunit tests are configured to be built-in and not modules. > > The test_kfree_rcu test invokes kfree_rcu() and boot sequence inspection > showed the runner for built-in kunit tests kunit_run_all_tests() is > called before setting system_state to SYSTEM_RUNNING and calling > rcu_end_inkernel_boot(), so this seems like a likely cause. So while I > was unable to reproduce the problem myself, skipping the test when the > slub_kunit module is built-in should avoid the issue. > > An alternative fix that was moving the call to kunit_run_all_tests() a > bit later in the boot was tried, but has broken tests with functions > marked as __init due to free_initmem() already being done. > > Fixes: 4e1c44b3db79 ("kunit, slub: add test_kfree_rcu() and test_leak_destroy()") > Reported-by: Guenter Roeck > Closes: https://lore.kernel.org/all/6fcb1252-7990-4f0d-8027-5e83f0fb9409@roeck-us.net/ I hope you can confirm it helps, because the commit added two tests and I've only skipped one of them, as it's the one using kfree_rcu(), which is suspected. But the other is responsible for the (now suppressed) kmem_cache_destroy() warning, and maybe I'm missing something and it was actually that one causing the lockups. Since you mentioned the boot lockups happened on some x86_64 too, do you have a .config of the lockup case? I've tried tweaking some rcu options but still nothing. Thanks! > Cc: "Paul E. McKenney" > Cc: Boqun Feng > Cc: Uladzislau Rezki > Cc: rcu@vger.kernel.org > Cc: Brendan Higgins > Cc: David Gow > Cc: Rae Moar > Cc: linux-kselftest@vger.kernel.org > Cc: kunit-dev@googlegroups.com > Signed-off-by: Vlastimil Babka > --- > lib/slub_kunit.c | 14 ++++++++++---- > 1 file changed, 10 insertions(+), 4 deletions(-) > > diff --git a/lib/slub_kunit.c b/lib/slub_kunit.c > index 85d51ec09846d4fa219db6bda336c6f0b89e98e4..80e39f003344858722a544ad62ed84e885574054 100644 > --- a/lib/slub_kunit.c > +++ b/lib/slub_kunit.c > @@ -164,10 +164,16 @@ struct test_kfree_rcu_struct { > > static void test_kfree_rcu(struct kunit *test) > { > - struct kmem_cache *s = test_kmem_cache_create("TestSlub_kfree_rcu", > - sizeof(struct test_kfree_rcu_struct), > - SLAB_NO_MERGE); > - struct test_kfree_rcu_struct *p = kmem_cache_alloc(s, GFP_KERNEL); > + struct kmem_cache *s; > + struct test_kfree_rcu_struct *p; > + > + if (IS_BUILTIN(CONFIG_SLUB_KUNIT_TEST)) > + kunit_skip(test, "can't do kfree_rcu() when test is built-in"); > + > + s = test_kmem_cache_create("TestSlub_kfree_rcu", > + sizeof(struct test_kfree_rcu_struct), > + SLAB_NO_MERGE); > + p = kmem_cache_alloc(s, GFP_KERNEL); > > kfree_rcu(p, rcu); > kmem_cache_destroy(s); >