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Re: [PATCH] don't use mmap() to hash files

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From: Paolo Bonzini
Subject: Re: [PATCH] don't use mmap() to hash files
Date: Monday, February 15, 2010 - 12:48 am

On 02/14/2010 08:56 PM, Dmitry Potapov wrote:

No, the kernel will use the file itself as "swap" if it has to page out 
the memory (since the mmap is PROT_READ).

Paolo
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Messages in current thread:
Re: Bug#569505: git-core: 'git add' corrupts repository if ..., Jonathan Nieder, (Thu Feb 11, 5:27 pm)
Re: Bug#569505: git-core: 'git add' corrupts repository if ..., Zygo Blaxell, (Thu Feb 11, 6:23 pm)
Re: 'git add' corrupts repository if the working directory ..., Jonathan Nieder, (Sat Feb 13, 5:12 am)
Re: 'git add' corrupts repository if the working directory ..., Ilari Liusvaara, (Sat Feb 13, 6:39 am)
Re: 'git add' corrupts repository if the working directory ..., Thomas Rast, (Sat Feb 13, 7:39 am)
Re: 'git add' corrupts repository if the working directory ..., Ilari Liusvaara, (Sat Feb 13, 9:29 am)
Re: 'git add' corrupts repository if the working directory ..., Dmitry Potapov, (Sat Feb 13, 3:09 pm)
Re: 'git add' corrupts repository if the working directory ..., Zygo Blaxell, (Sat Feb 13, 3:37 pm)
[PATCH] don't use mmap() to hash files, Dmitry Potapov, (Sat Feb 13, 6:18 pm)
mmap with MAP_PRIVATE is useless (was Re: Bug#569505: git- ..., Paolo Bonzini, (Sat Feb 13, 6:36 pm)
Re: [PATCH] don't use mmap() to hash files, Junio C Hamano, (Sat Feb 13, 6:37 pm)
Re: mmap with MAP_PRIVATE is useless, Junio C Hamano, (Sat Feb 13, 6:53 pm)
Re: [PATCH] don't use mmap() to hash files, Johannes Schindelin, (Sat Feb 13, 6:53 pm)
Re: [PATCH] don't use mmap() to hash files, Junio C Hamano, (Sat Feb 13, 7:00 pm)
Re: mmap with MAP_PRIVATE is useless, Paolo Bonzini, (Sat Feb 13, 7:11 pm)
Re: [PATCH] don't use mmap() to hash files, Dmitry Potapov, (Sat Feb 13, 7:18 pm)
Re: [PATCH] don't use mmap() to hash files, Dmitry Potapov, (Sat Feb 13, 7:42 pm)
[PATCH v2] don't use mmap() to hash files, Dmitry Potapov, (Sat Feb 13, 8:05 pm)
Re: [PATCH] don't use mmap() to hash files, Junio C Hamano, (Sat Feb 13, 8:14 pm)
Re: [PATCH] don't use mmap() to hash files, Jakub Narebski, (Sun Feb 14, 4:07 am)
Re: [PATCH] don't use mmap() to hash files, Thomas Rast, (Sun Feb 14, 4:14 am)
Re: [PATCH] don't use mmap() to hash files, Junio C Hamano, (Sun Feb 14, 4:46 am)
Re: [PATCH] don't use mmap() to hash files, Paolo Bonzini, (Sun Feb 14, 4:55 am)
Re: [PATCH] don't use mmap() to hash files, Johannes Schindelin, (Sun Feb 14, 11:10 am)
Re: [PATCH] don't use mmap() to hash files, Dmitry Potapov, (Sun Feb 14, 12:06 pm)
Re: [PATCH] don't use mmap() to hash files, Johannes Schindelin, (Sun Feb 14, 12:22 pm)
Re: [PATCH] don't use mmap() to hash files, Johannes Schindelin, (Sun Feb 14, 12:28 pm)
Re: [PATCH] don't use mmap() to hash files, Dmitry Potapov, (Sun Feb 14, 12:55 pm)
Re: [PATCH] don't use mmap() to hash files, Dmitry Potapov, (Sun Feb 14, 12:56 pm)
Re: [PATCH] don't use mmap() to hash files, Avery Pennarun, (Sun Feb 14, 4:13 pm)
Re: [PATCH] don't use mmap() to hash files, Zygo Blaxell, (Sun Feb 14, 4:52 pm)
Re: [PATCH] don't use mmap() to hash files, Nicolas Pitre, (Sun Feb 14, 9:16 pm)
Re: [PATCH] don't use mmap() to hash files, Avery Pennarun, (Sun Feb 14, 10:01 pm)
Re: [PATCH] don't use mmap() to hash files, Nicolas Pitre, (Sun Feb 14, 10:05 pm)
Re: [PATCH] don't use mmap() to hash files, Nicolas Pitre, (Sun Feb 14, 10:48 pm)
Re: [PATCH] don't use mmap() to hash files, Paolo Bonzini, (Mon Feb 15, 12:48 am)
Re: [PATCH] don't use mmap() to hash files, Dmitry Potapov, (Mon Feb 15, 5:23 am)
Re: [PATCH] don't use mmap() to hash files, Dmitry Potapov, (Mon Feb 15, 5:25 am)
Re: [PATCH] don't use mmap() to hash files, Avery Pennarun, (Mon Feb 15, 12:19 pm)
Re: [PATCH] don't use mmap() to hash files, Nicolas Pitre, (Mon Feb 15, 12:29 pm)
[PATCH] Teach "git add" and friends to be paranoid, Junio C Hamano, (Wed Feb 17, 6:16 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Junio C Hamano, (Wed Feb 17, 6:20 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Jeff King, (Wed Feb 17, 6:38 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Nicolas Pitre, (Wed Feb 17, 9:55 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Junio C Hamano, (Wed Feb 17, 10:36 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Wincent Colaiuta, (Thu Feb 18, 12:27 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Thomas Rast, (Thu Feb 18, 3:14 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Zygo Blaxell, (Thu Feb 18, 8:32 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Zygo Blaxell, (Thu Feb 18, 9:18 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Jonathan Nieder, (Thu Feb 18, 11:12 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Junio C Hamano, (Thu Feb 18, 11:16 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Junio C Hamano, (Thu Feb 18, 11:35 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Nicolas Pitre, (Thu Feb 18, 12:58 pm)
16 gig, 350,000 file repository, Bill Lear, (Thu Feb 18, 1:11 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Peter Harris, (Thu Feb 18, 1:14 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Junio C Hamano, (Thu Feb 18, 1:17 pm)
Re: 16 gig, 350,000 file repository, Nicolas Pitre, (Thu Feb 18, 1:58 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Nicolas Pitre, (Thu Feb 18, 2:30 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Jonathan Nieder, (Thu Feb 18, 6:04 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Dmitry Potapov, (Fri Feb 19, 1:28 am)
Re: 16 gig, 350,000 file repository, Erik Faye-Lund, (Fri Feb 19, 2:27 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Zygo Blaxell, (Fri Feb 19, 8:26 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Junio C Hamano, (Fri Feb 19, 10:51 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Junio C Hamano, (Fri Feb 19, 10:52 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Junio C Hamano, (Fri Feb 19, 10:52 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Zygo Blaxell, (Fri Feb 19, 12:08 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Junio C Hamano, (Sat Feb 20, 12:23 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Dmitry Potapov, (Sun Feb 21, 12:21 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Junio C Hamano, (Sun Feb 21, 12:32 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Dmitry Potapov, (Sun Feb 21, 8:35 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Junio C Hamano, (Sun Feb 21, 11:59 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Dmitry Potapov, (Mon Feb 22, 5:25 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Paolo Bonzini, (Mon Feb 22, 5:59 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Dmitry Potapov, (Mon Feb 22, 6:33 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Nicolas Pitre, (Mon Feb 22, 8:40 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Dmitry Potapov, (Mon Feb 22, 9:01 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Zygo Blaxell, (Mon Feb 22, 10:31 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Nicolas Pitre, (Mon Feb 22, 11:01 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Dmitry Potapov, (Mon Feb 22, 11:05 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Nicolas Pitre, (Mon Feb 22, 11:14 am)
Re: [PATCH] Teach "git add" and friends to be paranoid, Junio C Hamano, (Mon Feb 22, 12:56 pm)
Re: [PATCH] Teach "git add" and friends to be paranoid, Nicolas Pitre, (Mon Feb 22, 1:52 pm)
Re: 16 gig, 350,000 file repository, Bill Lear, (Mon Feb 22, 3:20 pm)
Re: 16 gig, 350,000 file repository, Nicolas Pitre, (Mon Feb 22, 3:31 pm)