LinuxQuestions.org
Download your favorite Linux distribution at LQ ISO.
Go Back   LinuxQuestions.org > Forums > LinuxQuestions.org > Linux - News > Syndicated Linux News
User Name
Password
Syndicated Linux News This forum is for the discussion of Syndicated Linux News stories.

Notices

Reply
 
Search this Thread
Old 01-11-2007, 07:03 PM   #1
LXer
LXer NewsBot
 
Registered: Dec 2005
Posts: 73,124

Rep: Reputation: 82
LXer: Linux: Accessing Files With O_DIRECT


Published at LXer:

A thread on the lkml began with a query about using O_DIRECT when opening a file. An earlywhite paper written by Andrea Arcangeli [interview] to describe the O_DIRECT patch before it was merged into the 2.4 kernel explains,"with O_DIRECT the kernel will do DMA directly from/to the physical memory pointed [to] by the userspace buffer passed as [a] parameter to the read/write syscalls. So there will be no CPU and memory bandwidth spent in the copies between userspace memory and kernel cache, and there will be no CPU time spent in kernel in the management of the cache (like cache lookups, per-page locks etc..)."

Read More...
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Accessing Linux files within Windows gaurav wadhwa24 Linux - General 7 01-21-2006 12:54 AM
accessing windows files from linux... kb_ganesh Linux - Newbie 2 06-24-2005 04:27 AM
Accessing Linux files from Windows gljubuncic Linux - Software 3 05-14-2005 09:14 PM
Accessing VMware files in Linux shane25119 Linux - Software 8 06-17-2004 01:26 AM
Accessing files- from both XP and Linux r_jensen11 Linux - Networking 1 09-13-2003 02:22 PM


All times are GMT -5. The time now is 01:13 AM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration