From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (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 6EF064C77D2 for ; Fri, 5 Jun 2026 10:45:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780656336; cv=none; b=TyIa+eVwmgb7PcZosITqA0kl+L+OhxB4zVf2/17bVyZCKxzVFM4A/lFq1MK2TwsdCJbVIyZEG2M9NdSLjtwzZ8SAuSydM3ZUQG4gcXjGAeaN3cCiqUSLMk/o35DX32JT7JacpYeSYwTZL0cjY2X4WTizmRuwKxqn2DUVWgLOhCA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780656336; c=relaxed/simple; bh=c2PKS1XW10wkafeF0Vt32lyjnrOfMLlC5d47nOHxxjA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=prty5X/GfSSwUAB0FcRCvhz2IOvMQIPQbCrrOOY8KGK0HnP5Qy/64JUVlI+URf5yV3Ko+YmE/jT7C2/2TqpFicyv1MoMSwq+mJrTrLX6vStQqk8VZ7UYUx8TfUIWMpBth9nt+OmBo9SMGL6Eh7boUEWOAhpgb5hLI3DnWC9bzzo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=xiRLXfX4; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=7fQSpUm6; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="xiRLXfX4"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="7fQSpUm6" Date: Fri, 5 Jun 2026 12:45:30 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1780656331; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=LF9yt+p04BquGQG0MmZssRiEKf6n47CAWgbzRxQjuak=; b=xiRLXfX4jztnbfL+V4MgNFZgm1X7vb8AWk2nY05svbNk3cs5n9ocs6ZZW9uz2BWgW1SSBc J3JMGuCsjuHLa+e9Ppwd8aXnazMVSmEiQ2GbRRjj2rBUWlVDo+jegGaWWBXVhX4NTkEBAZ jYgdTPRwgm5zdcuuojliMw7mRpMZQJettJc8s3833KOGPmQDKddVy4ItGKpXiro4oTRhAB 2OmwbjqrkZS6skr90Vf3hCcm1ERVe10oDha1rVMGoUweDHolyLiCkl9ThN5pxjM/34QeW2 SXtHJsiXOSsG64OncJAZ/MKkqr6uAUn/hOA2SKL9J9qbFhkKrshFM4CFJPUg8w== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1780656331; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=LF9yt+p04BquGQG0MmZssRiEKf6n47CAWgbzRxQjuak=; b=7fQSpUm6UBBsiU6BbltD1s/YZizdKBXb2ANhohwkFNNvbg/wAqFSsl1KVJPTm3jBhV379I v3J3lwzs5MExw3DA== From: Sebastian Andrzej Siewior To: Xi Ruoyao Cc: Jiayuan Chen , linux-rt-devel@lists.linux.dev, Steven Rostedt , Clark Williams , "Peter Zijlstra (Intel)" , linux-kernel@vger.kernel.org, Mingcong Bai , Henry Chen , Huacai Chen Subject: Re: [PATCH v2] irq_work: Fix use-after-free in irq_work_single on PREEMPT_RT Message-ID: <20260605104530.LDbF5MDD@linutronix.de> References: <20260330073234.303732-1-jiayuan.chen@linux.dev> <20260402065015.JKszGSXu@linutronix.de> <52db48708d5a7fbcd146745c4288e567424c909a.camel@xry111.site> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <52db48708d5a7fbcd146745c4288e567424c909a.camel@xry111.site> On 2026-06-05 18:31:41 [+0800], Xi Ruoyao wrote: > Hi, > > This commit significantly slows down execve() (and perhaps other things) > on MIPS. A very simple program: This is probably originating from sched_mm_cid_exit(). Can you check? Sebastian