From mboxrd@z Thu Jan 1 00:00:00 1970 From: Neil Brown Subject: Re: raid5-cache I/O path improvements V2 Date: Wed, 30 Sep 2015 15:39:52 +1000 Message-ID: <87vbaslb2v.fsf@notabene.neil.brown.name> References: <1442038638-6947-1-git-send-email-hch@lst.de> <87a8so6t8f.fsf@notabene.neil.brown.name> <20150915215458.GA1943628@devbig084.prn1.facebook.com> <20150928140127.GA30927@lst.de> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Return-path: In-Reply-To: <20150928140127.GA30927@lst.de> Sender: linux-raid-owner@vger.kernel.org To: Shaohua Li Cc: Christoph Hellwig , "linux-raid@vger.kernel.org" , Kernel Team , "dan.j.williams@intel.com" List-Id: linux-raid.ids --=-=-= Content-Type: text/plain Christoph Hellwig writes: > So the summary is that for now you want me to resend with a patch > to opt into using FUA? I'd like to avoid "opt in" if at all possible. Shoahua measured that using "FUA" for all writes to the journal hurt performance on at least one device. Do you have a different device where it demonstrably helps? If there any chance of automatically detecting which is which? > > Also do you have a git tree as a baseline somewhere? I've been collecting > the patches you've sent, but with increasing time I fear I might have > missed something. (almost) all at git://neil.brown.name/md in 'devel' branch. Thanks, NeilBrown --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJWC3WoAAoJEDnsnt1WYoG5JIkQAJ5+amQTLkjZf1GdLSJC5HNF CZEJpdenojzm9OGEu4zxT0JhQ5CFJ8Uk5TNdOxEbxIzjs9+N+I2XPYGgtjos6TqE vmLthhyNzxBDWF3ubwJoSm1BYUn7Po/YOLw8BZZXksCRoI+VCEJ6vpDSv2lykU5a u8W9bQhWYtFTYg5pP9dEYQoL10teY2OlarfaEeKcmRw6HF3RGSSsGKvZsq0EYhnZ em2K/iLmN1DUp1TwDqWQIHlEOu9ARrIj4lg/xut7cayNgTt1FvhYHswc02ACcz5u mRaj9Np6CCsRbNLYQljwY/FMYpAQRHA32yrGzgJNGP15NhPmaCfU5fajftAdolb8 ihh1K8qvnmZYDWj88eA6oX7MKBLQ427WcACA1n/33Icp4buGn/OTD6rYhVMsc4+G miV9QkP3vULMHFZtlq5SdXBH+p+DNcjpD7R/1G3o/oCnIfHH4LVXky8mOykLS4Ui oYcX+hLhvb/T+gTUdGDtl9WdS+M6fdQKNBuBz9ehhGeqSJ6MpkFdzXA8fJ7hxknl kDo+IV8oK7h3OGfogHsSpCInlul5sYbM0eqU0Hth92AnUM2O2PuvpzXlBXaTjrTb eHAN/xwTcvPYeJD3pxtXK3WfxeXZrbHjTVX0VIcPBYGG0e6J3+HX8If7T73lXhxG CyAM0YYa91wzszOEkOQ1 =Ey3n -----END PGP SIGNATURE----- --=-=-=--