From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5B83AC43387 for ; Fri, 11 Jan 2019 22:21:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 334262084C for ; Fri, 11 Jan 2019 22:21:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726515AbfAKWVw (ORCPT ); Fri, 11 Jan 2019 17:21:52 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:37109 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725767AbfAKWVv (ORCPT ); Fri, 11 Jan 2019 17:21:51 -0500 Received: by atrey.karlin.mff.cuni.cz (Postfix, from userid 512) id 32964809EC; Fri, 11 Jan 2019 23:21:43 +0100 (CET) Date: Fri, 11 Jan 2019 23:21:48 +0100 From: Pavel Machek To: "Theodore Y. Ts'o" , NeilBrown , Andy Lutomirski , Andreas Dilger , Peter Zijlstra , Dmitry Safonov , "H. Peter Anvin" , Denys Vlasenko , Linus Torvalds , Borislav Petkov , Ingo Molnar , Brian Gerst , LKML , Thomas Gleixner , linux-tip-commits@vger.kernel.org, jsimmons@infradead.org Subject: Re: in_compat_syscall() returns from kernel thread for X86_32. Message-ID: <20190111222148.GA3855@amd> References: <1460987025-30360-1-git-send-email-dsafonov@virtuozzo.com> <87h8hkc9fd.fsf@notabene.neil.brown.name> <871s8ndg6a.fsf@notabene.neil.brown.name> <871s8g6roy.fsf@notabene.neil.brown.name> <20181024131534.GD11606@thunk.org> <20181024143237.GA27168@thunk.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="sm4nu43k4a2Rpi4c" Content-Disposition: inline In-Reply-To: <20181024143237.GA27168@thunk.org> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --sm4nu43k4a2Rpi4c Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed 2018-10-24 10:32:37, Theodore Y. Ts'o wrote: > On Wed, Oct 24, 2018 at 09:15:34AM -0400, Theodore Y. Ts'o wrote: > > At least for ext4, the primary problem is that we want to use a 64-bit > > telldir/seekdir cookie if all 64-bits will make it to user space, and > > a 32-bit telldir cookie if only 32 bits will make it userspace. This > > impacts NFS as well because if there are people who are still using > > NFSv2, which has 32-bit directory offsets, we need to constrain the > > telldir/seekdir cookies we give to NFS to be a 32 has as opposed to a > > 64-bit hash. >=20 > Are there anyone still using NFSv2, BTW? One way of making the > problem *much* easier to sovle would be to drop NFSv2 support. :-) NFSv2 is now in "unexcpected" places such as U-Boot bootloader. I'm pretty sure someone still uses it... Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --sm4nu43k4a2Rpi4c Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlw5FvsACgkQMOfwapXb+vJyrACdFtNgxe2J3DJ0kvIFzQK2ypqH UQEAn0fZdH4FrJ88mO9723PMoXrcU+SI =0hbb -----END PGP SIGNATURE----- --sm4nu43k4a2Rpi4c--