In back-to-back sessions at the start of the 2026 Linux Storage,
Filesystem, Memory Management, and BPF Summit (which spilled over into
a third slot), the atomic-buffered-writes
feature was discussed.  In the first session, Pankaj Raghav and Andres
Freund set the stage with an introduction to the problem, along with a use
case for its solution: the PostgreSQL database system.  In the second, Ojaswin
Mujoo
described a potential way forward for the feature using an approach based
on writethrough, which effectively means that the kernel immediately writes
the data to disk instead of waiting for writeback from the page cache to occur. 
As might be
expected, there was quite a bit of discussion among the assembled
filesystems and storage developers during the combined sessions for those
tracks.

https://lwn.net/Articles/1072019/
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