From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wols Lists Subject: Re: [PATCH v3 5/9] raid5-ppl: Partial Parity Log write logging implementation Date: Thu, 9 Feb 2017 16:06:00 +0000 Message-ID: <589C9368.1020602@youngman.org.uk> References: <20170130185953.30428-1-artur.paszkiewicz@intel.com> <20170130185953.30428-6-artur.paszkiewicz@intel.com> <20170207214225.3jenvleiz3tldzlx@kernel.org> <43b52cb7-b9d6-f615-d7c0-d78fdbb9a0cd@intel.com> <20170208053444.b4yfmahmlrjgvv7x@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20170208053444.b4yfmahmlrjgvv7x@kernel.org> Sender: linux-raid-owner@vger.kernel.org To: Shaohua Li , Artur Paszkiewicz Cc: linux-raid@vger.kernel.org, shli@fb.com, neilb@suse.com, jes.sorensen@gmail.com List-Id: linux-raid.ids On 08/02/17 05:34, Shaohua Li wrote: > so it's the implementation which doesn't flush disk cache before writting new > data to disks, right? That makes sense then. I think we should fix this soon. > Don't think people will (or remember to) disable write-back cache before using > ppl. Dunno whether I'm making a fool of myself :-) but might a quick-n-dirty workaround be to make enabling PPL also disable write-back cache? With maybe a warning not to switch it back on? Cheers, Wol