From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=91.218.175.65 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792487790; b=xk9vDYvzVsYJVnh0Z8cH4upHLRNa2G3+5cSzGT+aIJAe1KZ4Pjyk6mmhgEXboYpjK/z1 q4PG9HxnQaUqYJAuegcGbbmgerkTvAq49TaDJ7XS8+p348z8IeaBPBE3KCZpp28fai7jG 7XP0NnxSQzXtI5q9c65bjhRZgilZD8A0+IQqrvV8QNp8qMKYhY0p3XBzcorPVFlLnaNQ7 KTUuNWnH+dDt0LfoqSyvyqXILOYDGKPW5mgWyPzBrEd8soac1/f46tIxlHJIxNPJ+2wH3 zlu/mD6AOVQrAEvcvbEeK73TiOI8PkrrTCUsK4ukPtX9NYN5lE4p4y3t04aLPafa1dg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792487790; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:Message-ID:Date:MIME-Version:User-Agent: Cc:Subject:To:References:From:In-Reply-To:Content-Type: Content-Transfer-Encoding; bh=fgVCjXg66MfmXK1DhMhAdx0UFOlMxpw0/DgjoCbhR4g=; b=o+9qGqdN0+hodQsuIrzBmYWcuSj1zcW6x9tWfPyhXYgwv6v/9imfD0TjPFPymwb3vud8 RW4Hi+vmYX2p54DgTqsDQ5emVfMSV9xrVNzFtKhSt6fUgv2Y36NJgvGcOJoDXrMgJ4l2U sgVxWDoVx/pPsiRcbfCdRV0a2ebGOnpsCYT/nq8X/x2gcaJEVSuGNopEhK5UTgNHw1rQM MaXNVvE0qwQxBkwLxW3yBihSid+QxR0m/B/nsCcYTu4Nt6/RmhzhJmWNWTpTgD3hXB0L9 ZbgUj/tJ+7M/4+A0SQ07d3XBtj3wUmPeT+KoDzLfIeWH2xHg3o4/SHpfrCFZcLyMNhg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=VXWXviUg; arc=none smtp.remote-ip=91.218.175.65 Received: from mta0.migadu.com (out-65.mta0.migadu.com [91.218.175.65]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 76E7C606A325 for ; Tue, 20 Oct 2026 09:16:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 76E7C606A325 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=VXWXviUg X-Envelope-To: cgroups@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=9eP3qjgVUbFfqUcF5YGr57onnQc45ct6s0INEa2Ebw8=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1792487786; v=1; x=1793092586; b=VXWXviUgLFBknZK+dXQMJD2opDdEMVE/cZ/3qSzssNRpsItYDpeGBg7DYwuILh0VryDri6KL oG1btPXLvLKGSJNsy4M1Hh1+41q+UVyMjWpK1vApTOqPMdpAMLmlKwQ4+RqbNC4cyZApJtfS7Nd 7ExI8i53YCSA+BxNDFWxvjQs= X-Envelope-To: cgroups@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id 8edb85ba72c7628e; Tue, 20 Oct 2026 09:16:26 +0000 X-Mizu-Trace-ID: 8edb85ba72c7628e X-Migadu-Flow: FLOW_OUT Message-ID: <6e7d6232-d422-47f3-bc85-a52508cb172f@linux.dev> Date: Tue, 20 Oct 2026 17:16:20 +0800 X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Cc: cui.tao@linux.dev, axboe@kernel.dk, josef@toxicpanda.com, yukuai@fygo.io, cgroups@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, linux-trace-kernel@vger.kernel.org Subject: Re: [PATCH v2 0/2] blk-iocost: fix hweight cache publication and donation fail-safe To: Kunhai Dai , tj@kernel.org References: <20261019125412.3123895-1-daikunhai@didiglobal.com> From: Tao Cui In-Reply-To: <20261019125412.3123895-1-daikunhai@didiglobal.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Hi Kunhai, 在 2026/10/19 20:54, Kunhai Dai 写道: > This series fixes the blk-iocost hweight cache publication race and adds a > fail-safe for invalid donation weights. > > Previous version: > https://lists.openwall.net/linux-kernel/2026/10/15/1954 > Replies: > https://lists.openwall.net/linux-kernel/2026/10/16/1431 > https://lists.openwall.net/linux-kernel/2026/10/16/2798 I re-ran the injection tests on my side (linux-next 20261019): two runs with a 30ms kprobe hold on every refresh of current_hweight() and one with the hold on every 50th refresh, same rt/s1..C topology and 1 <-> 10000 weight alternation load as before. No WARN or oops, and the tracepoint hweight fields decoded within [1, 65536] in every run. For the series: Tested-by: Tao Cui Reviewed-by: Tao Cui Thanks, Tao