From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-lf1-f41.google.com (mail-lf1-f41.google.com [209.85.167.41]) (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 4252B178361 for ; Fri, 26 Jul 2024 09:40:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.41 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721986852; cv=none; b=Sx8ixrbnw2O3eiwhgkrc9XoXHRfxHKqCqoUxosTSjqFwdYg2tl0jVAILngzuJRD7ULw0m2PFaxawwtjjlct2XCMgCPhsdWEcY8EX1xf4F9GSGzP9gsALI48xuS6Pgds3+aOPBDD7V3Crl2+XCvUcTrPbitCLZVVq3iNi+IJSwxA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721986852; c=relaxed/simple; bh=REuB5YOb/wxPQ5FOE3gwUmVnhCEuw5n23LIuVx9cWfg=; h=From:Date:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=atBBJaJsd49Qcx9rI5v9uHJpovz/Z6LsZe8L/OG/germ9wLGRH3ig4P91+bcS8GvgIF/OJykBbEU++vXBWrN59tgvT8KzxDn3ujY6IBgtEJ1yViiszUKY74+dC7rN18GBU6Dv1nJkBT6s2n2hH28Wixgw7VVVoQwInvjE4qSDGc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=a3EiBljF; arc=none smtp.client-ip=209.85.167.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="a3EiBljF" Received: by mail-lf1-f41.google.com with SMTP id 2adb3069b0e04-52f0277daa5so1611415e87.0 for ; Fri, 26 Jul 2024 02:40:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1721986849; x=1722591649; darn=lists.linux.dev; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:date:from:from:to:cc:subject:date:message-id:reply-to; bh=9XKH/1XXRddfq6FM5K3um05jFgZAL/dcezQzaeXuMZ8=; b=a3EiBljFxfsVyPEdi4spn57lCAh0BCUT6rAZ8N/lA7AqTl5ZZcKk75wy7sRKME+k/J ++WIrXMqa6ONSWLmWIHmvYCfB+TjWQEyNVTzVwlC6c6srBRVY4ZGoElEpT3wy1+TiLhg ip0l872LAJz8m/o+UWMEzPKa/aBD23oCewio2CebD6YqdtJNAjAUSrmgUIezveuUtHjY qLri/Ib3U2tN3QK+g7yPkcMt9raW6fW7AAkFelRvU8MoKPeXPp+8T4GhDRweNUfoj1zO aWSdl3WjSr3zzpKTkrfMvtwQKZecl2ctEbCBpiN7nKyPjo95QRvYdjQV07OyYXR67LHr 1Anw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721986849; x=1722591649; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:date:from:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=9XKH/1XXRddfq6FM5K3um05jFgZAL/dcezQzaeXuMZ8=; b=w64h0BYINOCvW+CPVSh0QKP553D7EADfgCOpcma86hwheq2lOMiJXEzPwzKa3Ywptn GEaqpRnmKSLR3Sm8D2rkyLe4gcPFiY95a/0Yx/IQngxZIPXsg80PNn96Sf+PBl/gVBxK RieVN57l6RYX9AwcxOWcwZQAA5QEPgHjhidOhSu1uWDrkIQbxslV67SVZ7rXxzx8oUSc 5PRHbww9Gln0OKBo2jVKcN2Qgm9FSLQPdC+Xu+74514paNH0HTdmJnMmzryP/OhFFO/X Os6Yfy1MFMdcLN956V7Ahj3hvy7Yp25MdbadStUxCX7gZ9zeqoefIDOD/sHYDQtoQPhX 9sww== X-Forwarded-Encrypted: i=1; AJvYcCWC+m1XhueDAJWr7xpfLStk1z0twnT5AlE5RDNNLdPvwdwZO234m5s5D5tU2VwAqBFXvcjJCro=@lists.linux.dev X-Gm-Message-State: AOJu0YyuPELcQdxowP9pT+7iCEqUl1Mt0VuSlMmtss8kHaU9B2jIMCxa fzmnq0yjpeyywtxKuSnx1B6og2witfuDYQFv966fLdbNXnzJgUWg X-Google-Smtp-Source: AGHT+IGxteMPmO0hYq91n8+s1yudDcT2HcqxVBNrQbT21+vrNjk6GoCxOWwvDeq6puujqFjEZMxq6w== X-Received: by 2002:a05:6512:124d:b0:52e:a60e:3a04 with SMTP id 2adb3069b0e04-52fd6098b28mr3833002e87.59.1721986849068; Fri, 26 Jul 2024 02:40:49 -0700 (PDT) Received: from pc636 (host-90-235-0-241.mobileonline.telia.com. [90.235.0.241]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-52fd5c2d48fsm444127e87.275.2024.07.26.02.40.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 26 Jul 2024 02:40:48 -0700 (PDT) From: Uladzislau Rezki X-Google-Original-From: Uladzislau Rezki Date: Fri, 26 Jul 2024 11:40:46 +0200 To: Vlastimil Babka , "Paul E. McKenney" Cc: kernel test robot , oe-lkp@lists.linux.dev, lkp@intel.com, linux-mm@kvack.org, RCU Subject: Re: [vbabka:slab-kfree_rcu-destroy-v1r0] [mm, slab] df00e211c9: WARNING:at_mm/slab_common.c:#kmem_cache_kfree_rcu_destroy_workfn Message-ID: References: <202407251313.32e55498-oliver.sang@intel.com> <4b31f1be-fbc5-404b-8a4e-1eb2ad4111e3@suse.cz> Precedence: bulk X-Mailing-List: oe-lkp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4b31f1be-fbc5-404b-8a4e-1eb2ad4111e3@suse.cz> On Fri, Jul 26, 2024 at 11:34:57AM +0200, Vlastimil Babka wrote: > On 7/25/24 7:59 AM, kernel test robot wrote: > > > > hi, Vlastimil Babka, > > > > we noticed by this commit: > > > > 7fd4dfd0d38db6f3 df00e211c9c11e8d20f2ea7b4ab > > ---------------- --------------------------- > > fail:runs %reproduction fail:runs > > | | | > > 6:6 -100% :6 dmesg.WARNING:at_mm/slab_common.c:#kmem_cache_destroy > > :6 100% 6:6 dmesg.WARNING:at_mm/slab_common.c:#kmem_cache_kfree_rcu_destroy_workfn > > > > below formal report just FYI what we observed in our tests. not sure if it's > > valuable to supply any hints. > > > > > > Hello, > > > > kernel test robot noticed "WARNING:at_mm/slab_common.c:#kmem_cache_kfree_rcu_destroy_workfn" on: > > > > commit: df00e211c9c11e8d20f2ea7b4ab1d7c9760fe822 ("mm, slab: asynchronously destroy caches with outstanding objects") > > https://git.kernel.org/cgit/linux/kernel/git/vbabka/linux.git slab-kfree_rcu-destroy-v1r0 > > Yes, that's expected proves we need the proper barrier added from the RCU > folks :) > Give me some time, i will implement it! After discussion with Paul it should not be so hard :) Thanks! -- Uladzislau Rezki