LWN.net Weekly Edition for May 12, 2022

This edition contains wall-to-wall coverage from the 2022 Linux Storage, Filesystem,
Memory-Management, and BPF Summit, including:
- Dealing with negative dentries: how
the kernel can manage the cache of file-name lookup failures better.
- Recent RCU changes: a quick overview
of read-copy-update (RCU) followed by descriptions of some of the
bigger changes that have gone into it over the last few years. - How to cope with hardware-poisoned
page-cache pages: What should the kernel do when memory errors corrupt a
page in the page cache? - Page pinning and filesystems: this
year's discussion on how to solve the problems with
get_user_pages(). - Ways to reclaim unused page-table
pages: a lot of the memory used to hold page tables is not needed
in that role and could be put to better uses. - The ongoing search for mmap_lock
scalability: the 2022 version of the perennial page-fault scalability
topic, perhaps with some solutions on the horizon this time. - Improving memory-management
documentation: how to capture some of the "tribal knowledge"
behind memory management and make it available to more developers. - The state of memory-management
development: : Andrew Morton describes some changes to how
memory-management patches are handled. - Seeking an API for protection keys
supervisor: protection keys can help to harden the kernel, but the
best way of managing them is still unclear. - Better tools for out-of-memory
debugging: understanding out-of-memory problems is not easy; what
can be done to improve the situation? - Changing filesystem resize patterns:
filesystems that are created small, but continually resized to be much
larger, are causing some headaches.
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