From: Pankaj Suryawanshi <pankajssuryawanshi@gmail.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Michal Hocko <mhocko@kernel.org>,
Vlastimil Babka <vbabka@suse.cz>,
pankaj.suryawanshi@einfochips.com
Subject: How cma allocation works ?
Date: Wed, 21 Aug 2019 22:58:03 +0530 [thread overview]
Message-ID: <CACDBo56W1JGOc6w-NAf-hyWwJQ=vEDsAVAkO8MLLJBpQ0FTAcA@mail.gmail.com> (raw)
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Hello,
Hard time to understand cma allocation how differs from normal allocation ?
I know theoretically how cma works.
1. How it reserved the memory (start pfn to end pfn) ? what is bitmap_*
functions ?
2. How alloc_contig_range() works ? it isolate all the pages including
unevictable pages, what is the practical work flow ? all this works with
virtual pages or physical pages ?
3.what start_isolate_page_range() does ?
4. what alloc_contig_migrate_range does() ?
5.what isolate_migratepages_range(), reclaim_clean_pages_from_list(),
migrate_pages() and shrink_page_list() is doing ?
Please let me know the flow with simple example.
Regards,
Pankaj
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next reply other threads:[~2019-08-21 17:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-21 17:28 Pankaj Suryawanshi [this message]
2019-08-22 13:02 ` Michal Hocko
2019-08-22 18:47 ` Pankaj Suryawanshi
2019-08-26 7:25 ` Michal Hocko
2019-08-26 17:11 ` Pankaj Suryawanshi
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