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Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
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From: Andi Kleen
Subject:
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
Date: Monday, July 7, 2008 - 9:43 am
On Mon, Jul 07, 2008 at 02:12:56PM +0200, Vitaly Mayatskikh wrote:
quoted text
> Vitaly Mayatskikh <v.mayatskih@gmail.com> writes: > > >> one), by limiting the byte-for-byte one to be within a page, but that > >> would be a "future enhancement" thing. > > > > Btw, how much does it cost to CPU to do a fault? Can it be compared with > > average time of find_vma()? > > Remark: this is for preventing fault in memset, not byte-to-byte copy.
memset never faults. The current code doesn't handle it and it never happened. -Andi --
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Messages in current thread:
[PATCH 3/3] Fix copy_user on x86_64
, Vitaly Mayatskikh
, (Fri Jun 27, 2:52 pm)
Re: [PATCH 3/3] Fix copy_user on x86_64
, Linus Torvalds
, (Sat Jun 28, 11:26 am)
Re: [PATCH 3/3] Fix copy_user on x86_64
, Vitaly Mayatskikh
, (Mon Jun 30, 8:12 am)
Re: [PATCH 3/3] Fix copy_user on x86_64
, Linus Torvalds
, (Mon Jun 30, 8:55 am)
Re: [PATCH 3/3] Fix copy_user on x86_64
, Andi Kleen
, (Mon Jun 30, 9:16 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Vitaly Mayatskikh
, (Wed Jul 2, 6:48 am)
Re: [PATCH 2/2] Fix copy_user on x86
, Vitaly Mayatskikh
, (Wed Jul 2, 6:53 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Andi Kleen
, (Wed Jul 2, 7:06 am)
Re: [PATCH 2/2] Fix copy_user on x86
, Andi Kleen
, (Wed Jul 2, 7:08 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Vitaly Mayatskikh
, (Wed Jul 2, 7:31 am)
Re: [PATCH 2/2] Fix copy_user on x86
, Vitaly Mayatskikh
, (Wed Jul 2, 7:36 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Andi Kleen
, (Wed Jul 2, 8:06 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Vitaly Mayatskikh
, (Wed Jul 2, 8:32 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Andi Kleen
, (Wed Jul 2, 8:40 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Vitaly Mayatskikh
, (Wed Jul 2, 8:58 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Andi Kleen
, (Wed Jul 2, 11:54 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Linus Torvalds
, (Wed Jul 2, 7:35 pm)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Vitaly Mayatskikh
, (Mon Jul 7, 5:09 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Vitaly Mayatskikh
, (Mon Jul 7, 5:12 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Linus Torvalds
, (Mon Jul 7, 9:21 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Andi Kleen
, (Mon Jul 7, 9:43 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Vitaly Mayatskikh
, (Mon Jul 7, 10:05 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Ingo Molnar
, (Wed Jul 9, 6:03 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Vitaly Mayatskikh
, (Wed Jul 9, 6:16 am)
Re: [PATCH 1/2] Introduce copy_user_handle_tail routine
, Ingo Molnar
, (Wed Jul 9, 6:52 am)
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