BACKPORT: mm: page_alloc: consolidate free page accounting
Free page accounting currently happens a bit too high up the call stack, where it has to deal with guard pages, compaction capturing, block stealing and even page isolation. This is subtle and fragile, and makes it difficult to hack on the code. Now that type violations on the freelists have been fixed, push the accounting down to where pages enter and leave the freelist. [hannes@cmpxchg.org: undo unrelated drive-by line wrap] Link: https://lkml.kernel.org/r/20240327185736.GA7597@cmpxchg.org [hannes@cmpxchg.org: remove unused page parameter from account_freepages()] Link: https://lkml.kernel.org/r/20240327185831.GB7597@cmpxchg.org [baolin.wang@linux.alibaba.com: fix free page accounting] Link: https://lkml.kernel.org/r/a2a48baca69f103aa431fd201f8a06e3b95e203d.1712648441.git.baolin.wang@linux.alibaba.com [andriy.shevchenko@linux.intel.com: avoid defining unused function] Link: https://lkml.kernel.org/r/20240423161506.2637177-1-andriy.shevchenko@linux.intel.com Link: https://lkml.kernel.org/r/20240320180429.678181-11-hannes@cmpxchg.org Change-Id: I984569d990d264bca9a7de1ec8f6ec94ecd58877 Signed-off-by:Johannes Weiner <hannes@cmpxchg.org> Signed-off-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by:
Baolin Wang <baolin.wang@linux.alibaba.com> Reviewed-by:
Vlastimil Babka <vbabka@suse.cz> Tested-by:
Baolin Wang <baolin.wang@linux.alibaba.com> Cc: David Hildenbrand <david@redhat.com> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> (cherry picked from commit e0932b6c) [ Replace MAX_PAGE_ORDER with max_order due to conflict with downstream TAO Replace add_to_freelist() with __add_to_free_pages() -> account_freepages() in expand() - Kalesh Singh ] Bug: 420771453 Signed-off-by:
Kalesh Singh <kaleshsingh@google.com>
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