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0da90af431
On memory unplug reduce DirectMap page count correctly.
root@ubuntu-guest:# grep Direct /proc/meminfo
DirectMap4k: 0 kB
DirectMap64k: 0 kB
DirectMap2M: 115343360 kB
DirectMap1G: 0 kB
Before fix:
root@ubuntu-guest:# ndctl disable-namespace all
disabled 1 namespace
root@ubuntu-guest:# grep Direct /proc/meminfo
DirectMap4k: 0 kB
DirectMap64k: 0 kB
DirectMap2M: 115343360 kB
DirectMap1G: 0 kB
After fix:
root@ubuntu-guest:# ndctl disable-namespace all
disabled 1 namespace
root@ubuntu-guest:# grep Direct /proc/meminfo
DirectMap4k: 0 kB
DirectMap64k: 0 kB
DirectMap2M: 104857600 kB
DirectMap1G: 0 kB
Fixes: a2dc009afa ("powerpc/mm/book3s/radix: Add mapping statistics")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Tested-by: Sachin Sant <sachinp@linux.ibm.com <mailto:sachinp@linux.ibm.com>>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230616110826.344417-4-aneesh.kumar@linux.ibm.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.