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

Written By
ML
Michael Larabel
Aug 1, 2016

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.
ML

Michael Larabel

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