Zack's Kernel News

Zack's Kernel News

Article from Issue 263/2022

This month in Kernel News: Chasing the Dream; The Power of the FUSE Side; NTFS3 Maintainership Issues: and Crashing and Warning.

Chasing the Dream

Liam Howlett, speaking for himself and Matthew Wilcox, recently announced the Maple Tree, which he wished to have included in Linux. Andrew Morton asked for a nice explanation of what the Maple Tree was. So, despite whatever lovely pastoral scene you might have envisioned would come next, Liam actually said, "the maple tree is an RCU-safe range based B-tree designed to use modern processor cache efficiently."

A B-tree is a data structure designed to let the user find and retrieve big pieces of data extremely efficiently. The "tree" in the name refers to a branching search path, where you ditch the wrong paths and narrow down the remaining search quickly. This is similar to the fun guessing game, where one person picks a secret number between 1 and 100 and then tells whether each of their friends' guesses is higher or lower than the secret number. However, instead of the "binary" high/low way of narrowing down the search, B-trees can split into more than two branches at a time.

As Liam put it, "With the increased branching factor, it is significantly shorter than the rbtree so it has fewer cache misses. The removal of the linked list between subsequent entries also reduces the cache misses and the need to pull in the previous and next VMA during many tree alterations."


Use Express-Checkout link below to read the full article (PDF).

Buy this article as PDF

Express-Checkout as PDF
Price $2.95
(incl. VAT)

Buy Linux Magazine

Get it on Google Play

US / Canada

Get it on Google Play

UK / Australia

Related content

  • Kernel News

    In kernel news: Vulnerabilities using a 32-Bit Kernel on a 64-Bit CPU; Working Around Hardware Security Vulnerabilities; and When It's OK to Panic.

  • Kernel News

    Chronicler Zack Brown reports on the patch submission process and the status of NTFS. 

  • Kernel News

    Chronicler Zack Brown reports on the little links that bring us closer within the Linux kernel community.

  • Live Distros with NTFS

    A Linux live distro may be just what you need to recover a Windows computer brought down by a system problem or virus attack. Knoppix creator Klaus Knopper gives you some tips for accessing NTFS from live Linux.

  • Paragon NTFS for Linux

    Paragon’s NTFS for Linux is a low-cost commercial alternative for accessing NTFS from Linux.

comments powered by Disqus

Direct Download

Read full article as PDF:

Price $2.95

Subscribe to our Linux Newsletters
Find Linux and Open Source Jobs
Subscribe to our ADMIN Newsletters

Support Our Work

Linux Magazine content is made possible with support from readers like you. Please consider contributing when you've found an article to be beneficial.