Deprecating scp [LWN.net]
Benefits for LWN subscribersThe primary benefit from subscribing to LWN is helping to keep us publishing, but, beyond that, subscribers get immediate access to all site content and access to a number of extra site features. Please sign up today! The scp command, which uses the SSH protocol to copy files between machines, is deeply wired into the fingers of many Linux users and developers — doubly
Supporting Linux kernel development in Rust
This article brought to you by LWN subscribersSubscribers to LWN.net made this article — and everything that surrounds it — possible. If you appreciate our content, please buy a subscription and make the next set of articles possible. The Rust programming language has long aimed to be a suitable replacement for C in operating-system kernel development. As Rust has matured, many developers have exp
Flushing out pdflush [LWN.net]
Benefits for LWN subscribersThe primary benefit from subscribing to LWN is helping to keep us publishing, but, beyond that, subscribers get immediate access to all site content and access to a number of extra site features. Please sign up today! The kernel page cache contains in-memory copies of data blocks belonging to files kept in persistent storage. Pages which are written to by a processor, b
PEP 572 and decision-making in Python [LWN.net]
This article brought to you by LWN subscribersSubscribers to LWN.net made this article — and everything that surrounds it — possible. If you appreciate our content, please buy a subscription and make the next set of articles possible. The "PEP 572 mess" was the topic of a 2018 Python Language Summit session led by benevolent dictator for life (BDFL) Guido van Rossum. PEP 572 seeks to add assignmen
Guido van Rossum resigns as Python leader [LWN.net]
Python creator and Benevolent Dictator for Life Guido van Rossum has decided, in the wake of the difficult PEP 572 discussion, to step down from his leadership of the project. "Now that PEP 572 is done, I don't ever want to have to fight so hard for a PEP and find that so many people despise my decisions. I would like to remove myself entirely from the decision process. I'll still be there for a w
A Python static typing update [LWN.net]
Benefits for LWN subscribersThe primary benefit from subscribing to LWN is helping to keep us publishing, but, beyond that, subscribers get immediate access to all site content and access to a number of extra site features. Please sign up today! One of the larger features added to Python over the last few releases is support for static typing in the language. Static type-checking and tools to supp
Ensuring data reaches disk [LWN.net]
Please consider subscribing to LWNSubscriptions are the lifeblood of LWN.net. If you appreciate this content and would like to see more of it, your subscription will help to ensure that LWN continues to thrive. Please visit this page to join up and keep LWN on the net. In a perfect world, there would be no operating system crashes, power outages or disk failures, and programmers wouldn't have to w
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That massive filesystem thread - LWN.net
Long, highly-technical, and animated discussion threads are certainly not unheard of on the linux-kernel mailing list. Even by linux-kernel standards, though, the thread that followed the 2.6.29 announcement was impressive. Over the course of hundreds of messages, kernel developers argued about several aspects of how filesystems and block I/O work on contemporary Linux systems. In the end (your ed
ext4 and data loss [LWN.net]
The ext4 filesystem offers a number of useful features. It has been stabilizing quickly, but that does not mean that it will work perfectly for everybody. Consider this example: Ubuntu's bug tracker contains an entry titled "ext4 data loss", wherein a luckless ext4 user reports: Today, I was experimenting with some BIOS settings that made the system crash right after loading the desktop. After a c
CoreOS looks to move from Btrfs to overlayfs [LWN.net]
LWN.net needs you!Without subscribers, LWN would simply not exist. Please consider signing up for a subscription and helping to keep LWN publishing After many years of different union filesystem implementations trying to get into the mainline, the overlay filesystem (also known as overlayfs) was finally merged for 3.18. It didn't take all that long for at least one project to notice and react to t
Sharing pages between mappings [LWN.net]
Benefits for LWN subscribersThe primary benefit from subscribing to LWN is helping to keep us publishing, but, beyond that, subscribers get immediate access to all site content and access to a number of extra site features. Please sign up today! In the memory-management subsystem, the term "mapping" refers to the connection between pages in memory and their backing store — the file that represents
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Which I/O controller is the fairest of them all? [LWN.net]
An I/O controller is a system component intended to arbitrate access to block storage devices; it should ensure that different groups of processes get specific levels of access according to a policy defined by the system administrator. In other words, it prevents I/O-intensive processes from hogging the disk. This feature can be useful on just about any kind of system which experiences disk conten
What is RCU, Fundamentally? [LWN.net]
December 17, 2007 This article was contributed by Paul McKenney [Editor's note: this is the first in a three-part series on how the read-copy-update mechanism works. Many thanks to Paul McKenney and Jonathan Walpole for allowing us to publish these articles. The remaining two sections will appear in future weeks.] Part 1 of 3 of What is RCU, Really? Paul E. McKenney, IBM Linux Technology Center Jo
Block/SCSI Data Integrity Support [LWN.net]
This is the first take of my data integrity patches. It's quite hard to explain everything in a brief couple of paragraphs but I'll try. There's more information to be found in the docs section at: http://oss.oracle.com/projects/data-integrity/ Here's the executive summary: What's This All About? ---------------------- These patches allow data integrity information (checksum and more) to be attach
Block layer introduction part 2: the request layer [LWN.net]
This article brought to you by LWN subscribersSubscribers to LWN.net made this article — and everything that surrounds it — possible. If you appreciate our content, please buy a subscription and make the next set of articles possible. The Linux block layer provides an upstream interface to filesystems and block-special devices allowing them to access a multitude of storage backends in a uniform ma
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The Linux "copy problem" [LWN.net]
Dynamic writeback throttling [LWN.net]
Versioned pointers: a new method of representing snapshots [LWN.net]
ext4 and data consistency [LWN.net]
A generic hash table [LWN.net]