macOS: Use MADV_FREE_REUSABLE for discardable shared memory.

macOS: Use MADV_FREE_REUSABLE for discardable shared memory.

MADV_FREE_REUSABLE has comparable behavior, but also marks the pages with the
reusable bit, which allows both Activity Monitor and memory-infra to correctly
track the pages.

BUG=713892
Review-Url: https://codereview.chromium.org/2834743002
Cr-Commit-Position: refs/heads/master@{#466280}
Committed: https://chromium.googlesource.com/chromium/src/+/61f066322d740afe3e2b17789fbc8960ed56558b

[erikchen, 2017-04-20 22:12:16]

The CQ bit was checked by erikchen@chromium.org to run a CQ dry run

[erikchen, 2017-04-20 22:12:32]

erikchen@chromium.org changed reviewers:
+ mark@chromium.org

[erikchen, 2017-04-20 22:12:33]

mark: Please review.

[commit-bot: I haz the power, 2017-04-20 22:12:50]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-04-20 22:16:30]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-04-20 22:16:31]

Dry run: Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)
  win_clang on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_clang/builds/...)

[erikchen, 2017-04-21 00:56:37]

The CQ bit was checked by erikchen@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-04-21 00:56:57]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-04-21 01:57:46]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-04-21 01:57:47]

Dry run: This issue passed the CQ dry run.

[Mark Mentovai, 2017-04-21 03:21:08]

LGTM

[erikchen, 2017-04-21 07:06:11]

The CQ bit was checked by erikchen@chromium.org

[commit-bot: I haz the power, 2017-04-21 07:06:24]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-04-21 07:10:42]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1492758371308100, "parent_rev":
"71e2c38925b47383e6a7f3fafe7296d99d8baa1c", "commit_rev":
"61f066322d740afe3e2b17789fbc8960ed56558b"}

[commit-bot: I haz the power, 2017-04-21 07:10:55]

Description was changed from

==========
macOS: Use MADV_FREE_REUSABLE for discardable shared memory.

MADV_FREE_REUSABLE has comparable behavior, but also marks the pages with the
reusable bit, which allows both Activity Monitor and memory-infra to correctly
track the pages.

BUG=713892
==========

to

==========
macOS: Use MADV_FREE_REUSABLE for discardable shared memory.

MADV_FREE_REUSABLE has comparable behavior, but also marks the pages with the
reusable bit, which allows both Activity Monitor and memory-infra to correctly
track the pages.

BUG=713892

Review-Url: https://codereview.chromium.org/2834743002
Cr-Commit-Position: refs/heads/master@{#466280}
Committed:
https://chromium.googlesource.com/chromium/src/+/61f066322d740afe3e2b17789fbc...
==========

[commit-bot: I haz the power, 2017-04-21 07:10:56]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/61f066322d740afe3e2b17789fbc...