Subj : [$] Supporting untorn buffered writes
To   : All
From : LWN.net
Date : Fri Apr 04 2025 14:45:07

[$] Supporting untorn buffered writes

Date:
Fri, 04 Apr 2025 13:39:56 +0000

Description:
At last year's
Linux Storage, Filesystem,
Memory-Management, and BPF Summit (LSFMM+BPF), there was a discussion about 
atomic writes that was
accompanied by patches to support the feature in the block layer, and for
direct I/O on XFS.  That
work was merged, but another piece of that discussion concerned adding the
feature for buffered I/O , in part because the PostgreSQL database currently
has to jump through hoops to ensure that its writes are not "torn"
(partially written) when there is an error or crash.  Luis Chamberlain led
a combined storage and filesystem track at this year's summit to revisit
the idea of providing atomic (or untorn) writes for buffered I/O .

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Link to news story:
https://lwn.net/Articles/1016015/


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