[Webkit-unassigned] [Bug 227957] New: [BMalloc] Lazily allocate physical pages

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Jul 14 10:09:15 PDT 2021


            Bug ID: 227957
           Summary: [BMalloc] Lazily allocate physical pages
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: bmalloc
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: msaboff at apple.com
                CC: ggaren at apple.com

Currently we call madvise(p, vmSize, MADV_FREE_REUSE) when we want to commit physical pages to a range of reserved memory.  On Darwin systems, the kernel will do this for us as we touch the pages.  Therefore we can eliminate this call, reducing our memory footprint when pages within a range are not used.

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