From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <1535092156.11909.8.camel@burcheri.de> Subject: Re: MQ-BFQ crashing on battery mode From: Massimo Burcheri To: Jens Axboe Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, Omar Sandoval In-Reply-To: References: <1534926011.18658.29.camel@burcheri.de> Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-g/wU6nwrQoj7I+d5cqX4" Date: Fri, 24 Aug 2018 08:29:16 +0200 Mime-Version: 1.0 List-ID: --=-g/wU6nwrQoj7I+d5cqX4 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2018-08-22 at 11:42 -0600, Jens Axboe wrote: > Any chance you can try 4.18 at least? Of course, I tried the kernel.org sources now, sys-kernel/vanilla-sources-4= .18.3=20 on Gentoo. The issue is the same. I wonder that nobody has noticed that issue that I can reproduce on many ke= rnels since 4.13 or even older. Is it a rare combination with my bcache, luks or btrfs? Or hardware specific? Or scheduler specific, as even BFQ is not that= well tested on btrfs like the default one. > Schedulers are specific to the queuing infrastructure, so certain types > will only be available with MQ and certain types will only be available > on !MQ. I noticed that. It's just a bit intransparent from the menuconfig, options = don't mention if a scheduler is working on MQ or not, like CONFIG_IOSCHED_BFQ. There it's written in the description, while CONFIG_MQ_IOSCHED_KYBER has th= e note in the name. Actually MQ schedulers could depend on BLK_MQ to make it obvious. Best regards, Massimo --=-g/wU6nwrQoj7I+d5cqX4 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEjdL61EKP3VOAA+I8lQj3p5VSZjIFAlt/pbwACgkQlQj3p5VS ZjLVbhAAiSmWLiGV5zu+M11FU6Z4W5Emdl6fZHJG9w424mH/7A0hRwgpVup79uJ3 nHW7W/oZMc5g3dshJ6raZICSiEnWc4ichvgXcTIY5jNQdmntG1KstFszucT8z7iP MC5NfteTJGjgvH//INcIkId71d8BFbynqUNZA8uYGsNrq8i1IjTYb3VIhtnafGWf dei2cKwGhFVKA7vOZkSRaD/u1eR7lKfoLewUuVC09ufVrKlkiAZ1fEEUc0RL6UZ9 /LGkBwoywBGSaLfIk306P3mWfJN4Bc+X2qO/N3Nqq1f4jbtG+7NYnGhi+t9+1zXu /0/GxnGJ8OAwd4i83bMwahaYNu3/5Zqe6/UlU3Vq5/UHWdjTyFoWYs29IA6cL+Kg 65+h6YQ8hY78pvhnicH756+OGkf40rr+NIwzAZZ4nqfFiLn/lzJlVQcP4E9bY5ni XTDUfprpeAUDeuFtD9gDtdm523dKXXsKcDOMJGpeeIJgDwagG/g8QuOrr0xFkQ+c 5m3BxGAdTBQeSbjxh34Av53sK8CRr7mm8bYNYepBXpYnfTMzrtfKzRRoqcr3Dv7E HnHk12l3SeyljRpmfQ9UtkrAIyjW0PbVwu7B3WekFV5Sh6NO1tTYJXj0MBzCJGov aTbBA0uD7jgQta6SrHlWk9Z65YtI4Ax5eI6H4sU25rmGSAf11mQ= =vvfj -----END PGP SIGNATURE----- --=-g/wU6nwrQoj7I+d5cqX4--