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Expose /proc/pressure (#1261)

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This enables the collection of pressure stall information as exposed
by the `/proc/pressure` interface added in the 4.20 release of the
Linux kernel.

Closes #1174

Signed-off-by: Daniele Sluijters <daenney@users.noreply.github.com>
This commit is contained in:
Daniele Sluijters 2019-04-18 11:19:20 +01:00 • committed by Ben Kochie
commit cc2fd82008
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@ -73,6 +73,7 @@ logind | Exposes session counts from [logind](http://www.freedesktop.org/wiki/So
meminfo\_numa | Exposes memory statistics from `/proc/meminfo_numa`. | Linux
mountstats | Exposes filesystem statistics from `/proc/self/mountstats`. Exposes detailed NFS client statistics. | Linux
ntp | Exposes local NTP daemon health to check [time](./docs/TIME.md) | _any_
pressure | Exposes pressure stall statistics from `/proc/pressure/`. | Linux (kernel 4.20+ and/or [CONFIG\_PSI](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/accounting/psi.txt))
processes | Exposes aggregate process statistics from `/proc`. | Linux
qdisc | Exposes [queuing discipline](https://en.wikipedia.org/wiki/Network_scheduler#Linux_kernel) statistics | Linux
runit | Exposes service status from [runit](http://smarden.org/runit/). | _any_