On Wed, 7 Feb 2024 10:04:31 +0530 Anshuman Khandual <anshuman.khandual@xxxxxxx> wrote: > > The changelog doesn't explain why Linux needs this feature. The value > > to our users. Perhaps that info is buried in the link which is buried > > below the ^---$, but as this is the most important part of a changelog, > > it really should be spelled out here, completely and carefully please. > > Does this look better ? > > mm/cma: Add sysfs file 'release_pages_success' > > This adds the following new sysfs file tracking the number of successfully > released pages from a given CMA heap area. This file will be available via > CONFIG_CMA_SYSFS and help in determining active CMA pages available on the > CMA heap area. This adds a new 'nr_pages_released' (CONFIG_CMA_SYSFS) into > 'struct cma' which gets updated during cma_release(). > > /sys/kernel/mm/cma/<cma-heap-area>/release_pages_success > > After this change, an user will be able to find active CMA pages available > in a given CMA heap area via the following method. > > Active pages = alloc_pages_success - release_pages_success > > That's valuable information for both software designers, and system admins > as it allows them to tune the number of CMA pages available in the system. > This increases user visibility for allocated CMA area and its utilization. yup, thanks. I added the patch with the above for a changelog.
