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Btrfs ENOSPC Rework Lands For Linux 4.8, Boosts Throughput & Lowers Latency

Aug 01, 2016, 09:00 (0 Talkback[s])
(Other stories by Michael Larabel)
The Btrfs "enospc-rework" that's been in development for several months by Facebook's Josef Bacik is landing with the Linux 4.8 kernel.


The ENOSPC rework is about reworking the handling for no-space checking/handling by the file-system. The existing code would encounter issues with huge latency spikes, too much being flushed, and not all of the file-system's flushing being asynchronous. The code by Josef Bacik is making use of tickets for reservations of space on the file-system. The new ticket-based reservation approach is explained further by this patch.

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