From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-3.0 required=3.0 tests=AWL,BAYES_00, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_HI,RCVD_IN_SORBS_SPAM,RP_MATCHES_RCVD shortcircuit=no autolearn=no autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id 23243202D7 for ; Wed, 8 Mar 2017 15:41:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753509AbdCHPlj (ORCPT ); Wed, 8 Mar 2017 10:41:39 -0500 Received: from mout.gmx.net ([212.227.17.21]:52527 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753108AbdCHPk5 (ORCPT ); Wed, 8 Mar 2017 10:40:57 -0500 Received: from virtualbox ([37.201.192.247]) by mail.gmx.com (mrgmx101 [212.227.17.168]) with ESMTPSA (Nemesis) id 0M6vSj-1c0q3A3m8z-00wngL; Wed, 08 Mar 2017 16:40:50 +0100 Date: Wed, 8 Mar 2017 16:40:48 +0100 (CET) From: Johannes Schindelin X-X-Sender: virtualbox@virtualbox To: Ian Jackson cc: Linus Torvalds , Jonathan Nieder , Git Mailing List , Stefan Beller , bmwill@google.com, Jonathan Tan , Jeff King Subject: Re: RFC: Another proposed hash function transition plan In-Reply-To: <22719.59633.269164.986923@chiark.greenend.org.uk> Message-ID: References: <20170304011251.GA26789@aiede.mtv.corp.google.com> <22719.680.730866.781688@chiark.greenend.org.uk> <22719.59633.269164.986923@chiark.greenend.org.uk> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Provags-ID: V03:K0:LTWfCMl+gNcwi4abfD4ALo+74QXUm0FNOHRcWWmDlPF+VTAYSwK W6xOsYHSft47g7ZsKw9LMAbUsP2k0LV0yvPTmFOCydbcCebg5mTaoN2POD10DikgvCfRSi2 +eLNN/6RSiWgsfcplI5skq7JqsAaHewtBZtIhZLqobNf3Hm3aD1eOl8DVNukmmCsbxr0kwy QLlbRQA6ReowgHheDTlZQ== X-UI-Out-Filterresults: notjunk:1;V01:K0:5+vqoCROA3s=:rd3AulpWodh4WH1lfhybez eX8tsAWPvkGnZzesM6XYRFy+4ppjRKO16QkolAg+OzJAUKTzEPJObdwICV2EvN2UUT0x2hR7f osBYs0EoH13SaD16QnIwJIaw4ZaJhuJpcPdLdQ5jOKa02yVMtCRpfD7OhWoLmLzOJ0WQMLW41 upTedjcbdZZqRaqtu3uk1W2ScUhze7u6t1h8ahlWvInPBUkGUGoUFkzhBpEA5pH4yptgdRZkz tmu4yvT7QzFUCkKlsnsOuLxoT0gNDA2nLvv12U+hGy//Q+t3XXGQpzS/H8+Iy8dzefqMtq33s Br12Fi6eNJAt/PsITJI/fVtlVD//rg55C8UW4/OpJQWX2uA0mw60vHlJDx1+A6vtZUjWF096Z zXulsklp9MSuasGw1IvrnTXBZcjVuJqCg6AZhkn9vZKkYlV9rTtpnsV5F6TDjVQlg380cLNKR 6m6GV0At+65mZxkQXMMxQ+U0wYXV+FSU7WtauUWD8oe02fwaSsBokca2AmfB3SBlivW7Y+swl +nzpmavCVd1ULVUFCVYPzDzKymc9UyEMM/kMxVxR0RLqmG7Q6T8NVxNhG5rCClDqH3hi6WUt+ 9yw0CQVO7JkTX3eLnon1LJ/Db0mRPGLh87lN4KVLptrTFVmhbFj1BWBJbCM7avbzngTUTp5jw stLskL8osXJbjgQeE92jPp9i7Jh4drH6lcb/zn6+4er2VpKCs5+UHIKSuSuC77ODdl7eVCRd1 w9WLWAtOTyw5NTLAxEbnPvnekO3oltl3td/bXiuNv6YfWrv8TJpy2kciPVyH7BfEbMfW+pTFx Gj/hdOb Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Hi Ian, On Wed, 8 Mar 2017, Ian Jackson wrote: > Linus Torvalds writes ("Re: RFC: Another proposed hash function transition plan"): > > Of course, having written that, I now realize how it would cause > > problems for the usual shit-for-brains case-insensitive filesystems. > > So I guess base64 encoding doesn't work well for that reason. > > AFAIAA object names occur in publicly-visible filenames only in notes > tree objects, which are manipulated by git internally and do not > necessarily need to appear in the filesystem. > > The filenames in .git/objects/ can be in whatever encoding we like, so > are not an obstacle. Given that the idea was to encode the new hash in base64 or base85, we *are* talking about an encoding. In that respect, yes, it can be whatever encoding we like, and Linus just made a good point (with unnecessary foul language) of explaining why base64/base85 is not that encoding. Ciao, Johannes