[all-commits] [llvm/llvm-project] 8b2688: [scudo] Separated committed and decommitted entrie...

[Joshua Baehring via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8b2688bd173e79392927bcaed91855e7c4db8eaa
      https://github.com/llvm/llvm-project/commit/8b2688bd173e79392927bcaed91855e7c4db8eaa
  Author: Joshua Baehring <98630690+JoshuaMBa at users.noreply.github.com>
  Date:   2024-07-31 (Wed, 31 Jul 2024)

  Changed paths:
    M compiler-rt/lib/scudo/standalone/secondary.h

  Log Message:
  -----------
  [scudo] Separated committed and decommitted entries. (#100818)

Initially, the LRU list stored all mapped entries with no distinction
between the committed (non-madvise()'d) entries and decommitted
(madvise()'d) entries. Now these two types of entries are separated into
two lists, allowing future cache logic to branch depending on whether or
not entries are committed or decommitted. Furthermore, the retrieval
algorithm will prioritize committed entries over decommitted entries.
Specifically, valid-fit, committed entries (not necessarily optimal-fit)
are retrieved before optimal-fit, decommitted entries.



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