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When executing transhuge-stress with an argument to specify the virtual memory size for testing, the ram size is reported as 0, e.g. transhuge-stress 384 thp-mmap: allocate 192 transhuge pages, using 384 MiB virtual memory and 0 MiB of ram thp-mmap: 0.184 s/loop, 0.957 ms/page, 2090.265 MiB/s 192 succeed, 0 failed This appears to be due to a thinko in commit0085d61fe0("selftests/vm/transhuge-stress: stress test for memory compaction"), where, at a guess, the intent was to base "xyz MiB of ram" on `ram` size. Here are results after using `ram` size: thp-mmap: allocate 192 transhuge pages, using 384 MiB virtual memory and 14 MiB of ram Link: https://lkml.kernel.org/r/20210825135843.29052-1-george_davis@mentor.com Fixes:0085d61fe0("selftests/vm/transhuge-stress: stress test for memory compaction") Signed-off-by: George G. Davis <davis.george@siemens.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Eugeniu Rosca <erosca@de.adit-jv.com> Cc: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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.