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[$] Filesystems and iomap

The iomap block-mapping abstraction is being used by more filesystems, in part because of its support for large folios. But there are some challenges in adopting iomap, which was the topic of a discussion led by Ritesh Harjani in a combined storage and filesystem session at the 2024 Linux Storage, Filesystem, Memory Management, and BPF Summit. One of the main trouble spots is how to handle metadata, which is not an area that iomap has been aimed at.

[$] Measuring memory fragmentation

In the final session in the memory-management track of the 2024 Linux Storage, Filesystem, Memory-Management and BPF Summit, the exhausted group of developers looked one more time at the use of huge pages and the associated problem of memory fragmentation. At its worst, this problem can make huge pages harder (and more expensive) to allocate. Luis Chamberlain, who ran the session, felt that people were worried about this problem, but that there was little data on how severe it truly is.

[$] The state of the memory-management community in 2024

A longstanding tradition in the memory-management track of the Linux Storage, Filesystem, Memory-Management and BPF Summit is a session with maintainer Andrew Morton to discuss the overall state of the community and the development process. The 2024 gathering upheld that tradition toward the end of the final day of the event. It seems that Morton and the assembled developers were all happy with how memory-management work is going, but there is always room for improvement.

Security updates for Tuesday

Security updates have been issued by Debian (less), Mageia (chromium-browser-stable), SUSE (apache2, java-1_8_0-openj9, kernel, libqt5-qtnetworkauth, and openssl-3), and Ubuntu (netatalk and python-cryptography).
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