Re: [PATCH v3 0/4] mm: add more kernel parameters to control mTHP

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On Wed, 30 Oct 2024 09:58:54 -0300 Maíra Canal <mcanal@xxxxxxxxxx> wrote:

> The second and third patches focus on controlling THP support for shmem
> via the kernel command line. The second patch introduces a parameter to
> control the global default huge page allocation policy for the internal
> shmem mount. 

The changelogs for patches 2 and 3 both say

: By configuring ..., applications that use shmem, such as the DRM GEM objects,
: can take advantage of mTHP before it's been configured through sysfs.

There isn't a lot of info here - please explain this timing issue in
more detail.

Because the question which leaps to mind is: shouldn't the
"applications that use shmem" be changed to "configure mTHP through
sysfs" *before* "using shmem"?  Seems pretty basic.


Also, please consider my question to be a critique of the changelogs. 
If the changelogs were complete, I wouldn't need to ask any questions!





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