From: Eric Sandeen Subject: Re: ext4-lazy (SMR-optimizations) landing to kernel? Date: Mon, 17 Apr 2017 09:18:11 -0500 Message-ID: References: <6B0F0C59-6930-41B3-8EE4-EA5BEECEB9F9@dilger.ca> Reply-To: sandeen@redhat.com Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="nEmVIw6nmQhOa96kmITbc1PCU7LBDH0qp" Cc: linux-ext4 To: Andreas Dilger , Ts'o Theodore Return-path: Received: from mx1.redhat.com ([209.132.183.28]:35770 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751874AbdDQOSS (ORCPT ); Mon, 17 Apr 2017 10:18:18 -0400 In-Reply-To: <6B0F0C59-6930-41B3-8EE4-EA5BEECEB9F9@dilger.ca> Sender: linux-ext4-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --nEmVIw6nmQhOa96kmITbc1PCU7LBDH0qp Content-Type: multipart/mixed; boundary="ND59xDfAuHpw14RCcFxCIev46QW4cDpis"; protected-headers="v1" From: Eric Sandeen Reply-To: sandeen@redhat.com To: Andreas Dilger , Ts'o Theodore Cc: linux-ext4 Message-ID: Subject: Re: ext4-lazy (SMR-optimizations) landing to kernel? References: <6B0F0C59-6930-41B3-8EE4-EA5BEECEB9F9@dilger.ca> In-Reply-To: <6B0F0C59-6930-41B3-8EE4-EA5BEECEB9F9@dilger.ca> --ND59xDfAuHpw14RCcFxCIev46QW4cDpis Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On 4/10/17 10:06 PM, Andreas Dilger wrote: > Hi Ted, > now that FAST'17 is behind us, is there any plan to land the ext4-lazy = code > (SMR optimizations) to the upstream kernel? This looks like it improve= s > some workloads even without SMR disks, and doesn't have any noticeable > overhead for other workloads. >=20 > I'd guess the one thing that we might want to do is still allow the jou= rnal > to optionally checkpoint the metadata to the filesystem in the backgrou= nd, > when the filesystem is otherwise idle, so that in case of journal loss = for > some reason the whole filesystem is not lost? IIRC even the new larger default journal size was a big win by itself, ye= s? -Eric --ND59xDfAuHpw14RCcFxCIev46QW4cDpis-- --nEmVIw6nmQhOa96kmITbc1PCU7LBDH0qp Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2 Comment: GPGTools - http://gpgtools.org iQIcBAEBCAAGBQJY9M6oAAoJECCuFpLhPd7gjr0QALu5J0o8YUyCPsSv2bZTsuUl 9jrGUPyhVyCoLPUm8oAGDlhnr9eUzRCqfxhT1l1v9Hq1v4lE40EabCEqeb64icp8 YMVJ9TkmO5Pcp9FtDjrMVXHf66mrKiAj2GDpddqVa89S+rjaed+/AyoCYoB+2G8A YXmuxBa97UPdAtqggt+bnGt+MXf7pA2iLzqaRhBfwDkMYnOluRqCzfGnV0gxAwle MFaWK7zt+L369JojJDNAQ/vu1CStGTsu5rEX6kYXoNwD0JK0E1JAg/gqAL6okG3t 5p1xp/uJqOVdA2dea4wlSCFdq6beUy2cZA6GXAZt2wKtNyHNKcGpFgIguUJLXMc1 5Dq59s3pRVejX7e91Y7jFcbgrrZO3b2N8WiSMj9+hJvUpaP6kepWIYSH42XX2sih +XYnUjl3/zuurxWbKSynESv9icird6mOGRE+QJ74ILjRi5SH/QwXCsTq1KGnoLq/ Cwrl/3vuY66hjhzoNzcA4hVWdHmAaS+mQiiu0w5YtC5tmmnmHRsVwseUuO5U9U7B hlF+nl36QNmNh7dCgHbC7yB/a0H89zyFikNdBhpgQ0AOqElcxbtYxAuA9epRxr41 pj4xCdUYvlAEnz2eFwSqMZmqWxqwrI3D+sV73pQGRp3kg1SyP4IPu+RaRKL8SHX1 tWNLT46b3B3Qmmvcua2w =uRa0 -----END PGP SIGNATURE----- --nEmVIw6nmQhOa96kmITbc1PCU7LBDH0qp--