From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 258891E531; Fri, 6 Mar 2026 08:48:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772786929; cv=none; b=iOOuHhYidDkPDfw4Mfhcxo+LPNg6/wifskhLrof0ceAMtrbAko9Df8bs1aCAFowdF+KNygFTw9ZcrsO4BIrH2veElo1uSygYT6Vv+lCq+QlslTtuzjLgNFFqxRNvRcb64YqlMuGT3zxaNQEswV0xNGhoOEfckhGMgd5XTpk8/eY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772786929; c=relaxed/simple; bh=9xc2rd67zygfGvWAuXJWDaeN1yezR102MpqvN+cRWiQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=KeStYDIrqCTWfR5bL9g2B3f8ZNW1N/EaTSAbPyBm1FXqKclgeZf5fPXBb0xUp1AMRdAMjBpwk94tVrASJ+f14ihr9OvC0TXInMbL+P7ouZZahYy3/oW58IH8B/oFIFbXHIxJtOTyNuy3VaTBPPugktPPFUuVfRZsn8G8o+eb87M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=F3XfS5v7; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="F3XfS5v7" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=jUcog0pcNQnpMag/9mzHrQkTisayE/+eo7fVLOiHJG4=; b=F3XfS5v7gg+LLEYfVOP/YOGXgI iX1FEZne2zGA6mujKybrGTZl70Nn+57MW6qPR5+0BL3n/v52umGA5kR9cgh3ckkRR/hkjxUgCShb/ Wh516fLci3vnwQo2zXsmEr0p5vs/tWWJx9KW1/caWXgkdB99ivEq9228wnn0TZ0GIgOHnAbAyg7Ra 8cUmLDKuKUTwoxY1J/iVD5lSavhMAZiDf+NwOrefOuTjOgX4LBAuXBwWljQ+iuppBLKMqEQnjLoZ7 KWRuNwDtbhCkwDLad3yHbw2O2kcxWMvDHbJnARyQBZgScEVgyst5XQASqoa6BYWWBJLOhgVqp+JIf JygEY6cg==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1vyQrW-0000000GQ4K-1Lbh; Fri, 06 Mar 2026 08:48:46 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 1C2BF300B40; Fri, 06 Mar 2026 09:41:38 +0100 (CET) Date: Fri, 6 Mar 2026 09:41:38 +0100 From: Peter Zijlstra To: Heiko Carstens Cc: Mikhail Zaslonko , linux-next@vger.kernel.org, linux-s390@vger.kernel.org, Ingo Molnar , Alexander Egorenkov , Thomas Gleixner , "Paul E. McKenney" Subject: Re: [linux-next][s390] Boot hang after merge c50f05bd3c4e (sched/hrtick) Message-ID: <20260306084138.GR1282955@noisy.programming.kicks-ass.net> References: <28add480-4841-4e6a-a8a9-1211280ecc51@linux.ibm.com> <20260305074922.7170Ad3-hca@linux.ibm.com> <20260305121201.GB596554@noisy.programming.kicks-ass.net> <20260305123505.GA1395416@noisy.programming.kicks-ass.net> <20260305124501.GB1395416@noisy.programming.kicks-ass.net> <20260305130725.GB652779@noisy.programming.kicks-ass.net> <20260305150210.7170D10-hca@linux.ibm.com> <20260305194821.8663A9e-hca@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-next@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260305194821.8663A9e-hca@linux.ibm.com> On Thu, Mar 05, 2026 at 08:48:21PM +0100, Heiko Carstens wrote: > Mikhail, which commit did you revert? The above discussion is about commit > d8b5cf9c6314 ("s390/irq/idle: Remove psw bits early"), which is not > explicitly mentioned. > > But it is indeed broken: irqentry_exit() has a regs_irqs_disabled() check, > which I broke with this commit - but "only" for idle exit. > Result: no hrtimer_rearm_deferred() being called on idle exit. > > Oh well. Peter, thanks for pointing to this broken commit. Will be reverted. No problem; digging through unknown arch code is what keeps you sharp ;-)