「サイボウズ・アドベントカレンダー2012ã€ã‚‚ã€ä»Šæ—¥ã‚’入れã¦æ®‹ã‚Šï¼“æ—¥ã¨ãªã‚Šã¾ã—ãŸï¼ˆã“ã‚Œã¾ã§ã®è¨˜äº‹ä¸€è¦§ï¼‰ã€‚ ã¯ã˜ã‚ã« ã“ã‚“ã«ã¡ã¯ï¼Œã‚µã‚¤ãƒœã‚¦ã‚ºãƒ»ãƒ©ãƒœã®æ˜Ÿé‡Žã§ã™ï¼Ž ç§ã¯å…ˆæ—¥é–‹å‚¬ã•ã‚Œã¾ã—㟠WebDB Forum 2012 ã«ã¦ï¼Œãƒ–ãƒãƒƒã‚¯ãƒ‡ãƒã‚¤ã‚¹(ストレージ) ã®ãƒãƒƒã‚¯ã‚¢ãƒƒãƒ—ã¨ãƒ¬ãƒ—リケーションを効率化ã™ã‚‹ Linux カーãƒãƒ«ãƒ‡ãƒã‚¤ã‚¹ãƒ‰ãƒ©ã‚¤ãƒã€ŒWalBã€ã«ã¤ã„ã¦ã®ç™ºè¡¨ã‚’è¡Œã„ã¾ã—ãŸï¼Ž 発表内容ã«ã¤ãã¾ã—ã¦ã¯ï¼Œè³‡æ–™ã‚’ SlideShare ã«ã¦å…¬é–‹ã—ã¦ãŠã‚Šã¾ã™ã®ã§ï¼Œã“ã¡ã‚‰ ã‚’ã”覧下ã•ã„. 発表ã®ä¸ã§ç§ã¯ï¼ŒWalB プãƒãƒˆã‚¿ã‚¤ãƒ—ã®æ€§èƒ½è©•ä¾¡ã‚’è¡Œã£ãŸçµæžœï¼Œã‚ªãƒ¼ãƒãƒ¼ãƒ˜ãƒƒãƒ‰ãŒå°ã•ã„ã“ã¨ã‚’示ã™ã‚°ãƒ©ãƒ•ã‚’æ示ã—ã¾ã—ãŸï¼ŽãŸã ã—,最åˆã‹ã‚‰ã“ã®ã‚ˆã†ãªæ€§èƒ½ãŒå‡ºãŸã‚ã‘ã§ã¯ã‚ã‚Šã¾ã›ã‚“.åˆã‚ã¦ãƒ—ãƒãƒˆã‚¿ã‚¤ãƒ—ã‚’å‹•ã‹ã—ã¦æ€§èƒ½ãƒ‡ãƒ¼ã‚¿ã®ã‚°ãƒ©ãƒ•ã‚’見ãŸã¨ãã¯ï¼Œã€Œæœ€åˆã‹ã‚‰ã†ã¾ãã„ãã‚ã‘ãªã„よãã€ã¨æ€ã„ãªãŒã‚‰ã‚‚期待ã¨ç¾å®Ÿã®å·®ã«ãŒã£ã‹ã‚Šã—ã¾ã—ãŸï¼Ž 本
最近ã€Robert Love先生ã®æœ¬ã‚’暇ãªæ™‚ã«ãƒ€ãƒ©ãƒ¼ã¨èªã‚“ã§ã„ãŸã‚Šã™ã‚‹ã‚ã‘ã§ã™ãŒã€ãã‚Œã®ä¸ã«Linux Kernel内部ã§ä½¿ã‚ã‚Œã¦ã„ã‚‹Linked Listã®å®Ÿè£…ãŒæ›¸ã„ã¦ã‚ã£ã¦é¢ç™½ã‹ã£ãŸã®ã§å…±æœ‰ã€‚ ã¾ãšã€Linked Listã®ä¸€å€‹ä¸€å€‹ã®ã‚¨ãƒ³ãƒˆãƒªã‚’表ã™structを定義ã—ã¾ã™ã€‚ struct list_head { struct list_head *next, *prev; }; ã„ã‚„ã„ã‚„ã„ã‚„ã„や。ã„ã‹ã«C力ã®ä½Žã„僕ã§ã‚‚æµçŸ³ã«ã“ã‚Œã¯ã‚ãã¾ã›ã‚“。騙ã•ã‚Œã¾ã›ã‚“よ。å‰å¾Œã®ã‚¨ãƒ³ãƒˆãƒªã¸ã®ãƒã‚¤ãƒ³ã‚¿ã¯ç¢ºã‹ã«ã‚ã‚‹ã‘ã‚Œã©ã‚‚ã€ã“ã‚Œã«ã¯ãƒ‡ãƒ¼ã‚¿ã‚’指ã™ãŸã‚ã®ãƒã‚¤ãƒ³ã‚¿ãŒãªã„ã˜ã‚ƒãªã„ã®ã€‚ãŠã˜ã„ã¡ã‚ƒã‚“ã¾ãŸãƒ‡ãƒ¼ã‚¿å¿˜ã‚Œã¦ãã¡ã‚ƒã£ãŸã®ï¼Ÿã„ã‚„ã‚ããˆã€‚ ãŠã˜ã„ã¡ã‚ƒã‚“ã¯è¨€ã£ãŸã€‚「ãã‚Œã¯ãŠå‰ã®çŸè¦‹ã¨ã„ã†ã‚‚ã®ã˜ã‚ƒã€‚ã“ã®Linked Listã¯ä»¥ä¸‹ã®ã‚³ãƒ¼ãƒ‰ã®ã‚ˆã†ã«ãƒ‡ãƒ¼ã‚¿æ§‹é€ ã«åŸ‹ã‚込んã§ä½¿ã†ã‚‚ã®ãªã‚“ã˜ã‚ƒã‚ˆã€‚ã€ãã—ã¦ãã‚Œã¯æ£ã—ã‹ã£ãŸã€‚ st
1. The as_add_request function handles adding a new request to the Anticipatory scheduler. It obtains an io_context, updates request histories, adds the request to rb trees and lists, and updates the scheduler state. 2. When updating request histories, it calculates think time between requests and seek distance, and stores these in the io_context to model I/O behavior. 3. The scheduler state is al
This index covers articles published in the LWN.net Kernel Page. All articles from the beginning of 2004 have been entered here. Academic systems Realtime Linux: academia v. reality (July 26, 2010) Popcorn Linux pops up on linux-kernel (May 5, 2020) Access control lists Rich access control lists (October 20, 2015) ACCESS_ONCE() ACCESS_ONCE() (August 1, 2012) ACCESS_ONCE() and compiler bugs (Decemb
LWN.net is a reader-supported news site dedicated to producing the best coverage from within the Linux and free software development communities. See the LWN FAQ for more information, and please consider subscribing to gain full access and support our activities. [$] LWN.net Weekly Edition for March 20, 2025 Posted Mar 20, 2025 0:04 UTC (Thu) The LWN.net Weekly Edition for March 20, 2025 is availa
Linux Mkisofs CommandThe Linux mkisofs command is a versatile tool for creating ISO 9660 filesystem images, which are commonly used for distributing software and bootable media. Understanding how to use mkisofs effectively… Linux Mkfile CommandThe Linux mkfile command is a specialized utility designed for creating files with predetermined sizes, which is particularly useful for testing and perform
Discover cutting-edge IT insights from Europe's largest tech editorial team. Explore curated breaking news and expert opinions for tech enthusiasts and pros. Don't miss any news – follow us on Facebook, LinkedIn or Mastodon. For more than 20 years, Nixspam waded through the flood of unwanted emails and maintained an IP blacklist. Now the iX project is ending its services.
The document provides an introduction to Linux and device drivers. It discusses Linux directory structure, kernel components, kernel modules, character drivers, and registering drivers. Key topics include dynamically loading modules, major and minor numbers, private data, and communicating with hardware via I/O ports and memory mapping.Read less
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