linux-kernel - Time stats library (from bcache/bcachefs) & generic latency instrumentation

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Message-Id: <20220829165344.2958640-1-kent.overstreet@linux.dev>
Date:   Mon, 29 Aug 2022 12:53:41 -0400
From:   Kent Overstreet <kent.overstreet@...ux.dev>
To:     linux-kernel@...r.kernel.org, linux-bcache@...r.kernel.org,
        colyli@...e.de
Subject: Time stats library (from bcache/bcachefs) & generic latency instrumentation

Hey Coly, this is a fragment from a larger patch series - I wanted to send it
out to you now for review because it changes the bcache sysfs interface for
time_stats.

This series takes the time_stats code from bcachefs (which has some additional
improvements), moves it to lib/ converts bcache to use it (otherwise we get
clashes with the time_stats name) - and uses it for some really cool new latency
instrumentation.

These patches won't apply/build, full patch series for any interested is here:

https://evilpiepirate.org/git/bcachefs.git/log/?h=alloc_tags