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30b9aed8cd
Patch series "vm, vmscan: enahance vmscan tracepoints", v2.
While debugging [2] I've realized that there is some room for
improvements in the tracepoints set we offer currently. I had hard
times to make any conclusion from the existing ones. The resulting
problem turned out to be active list aging [3] and we are missing at
least two tracepoints to debug such a problem.
Some existing tracepoints could export more information to see _why_ the
reclaim progress cannot be made not only _how much_ we could reclaim.
The later could be seen quite reasonably from the vmstat counters
already. It can be argued that we are showing too many implementation
details in those tracepoints but I consider them way too lowlevel
already to be usable by any kernel independent userspace. I would be
_really_ surprised if anything but debugging tools have used them.
Any feedback is highly appreciated.
[1] http://lkml.kernel.org/r/20161228153032.10821-1-mhocko@kernel.org
[2] http://lkml.kernel.org/r/20161215225702.GA27944@boerne.fritz.box
[3] http://lkml.kernel.org/r/20161223105157.GB23109@dhcp22.suse.cz
This patch (of 8):
The trace point is not used since
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.