Revert of [heap] Add page evacuation mode for new->new

Revert of [heap] Add page evacuation mode for new->new (patchset #18 id:440001 of https://codereview.chromium.org/1957323003/ )

Reason for revert:
Fragmentation of LABs could result in increasing memory usage (pages) instead of shrinking.

BUG=chromium:620320
LOG=N

Original issue's description:
> [heap] Add page evacuation mode for new->new
>
> Adds an evacuation mode that allows moving pages within new space without
> copying objects.
>
> Basic idea:
> a) Move page within new space
> b) Sweep page to make iterable and process ArrayBuffers
> c) Finish sweep till next scavenge
>
> Threshold is currently 70% live bytes, i.e., the same threshold we use
> to determine fragmented pages.
>
> BUG=chromium:581412
> LOG=N
> CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_tsan_rel,v8_mac64_asan_rel
>
> Committed: https://crrev.com/49b23201671b25092a3c22eb85783f39b95a5f87
> Cr-Commit-Position: refs/heads/master@{#36990}

TBR=ulan@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:581412
Committed: https://crrev.com/2263ee9bf4e5aa341cbac547add68a2105963477
Cr-Commit-Position: refs/heads/master@{#37042}

[Michael Lippautz, 2016-06-16 16:24:10]

The CQ bit was checked by mlippautz@chromium.org

[Michael Lippautz, 2016-06-16 16:24:10]

Created Revert of [heap] Add page evacuation mode for new->new

[commit-bot: I haz the power, 2016-06-16 16:24:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2063013005/1

[commit-bot: I haz the power, 2016-06-16 16:52:51]

Description was changed from

==========
Revert of [heap] Add page evacuation mode for new->new (patchset #18 id:440001
of https://codereview.chromium.org/1957323003/ )

Reason for revert:
Fragmentation of LABs could result in increasing memory usage (pages) instead of
shrinking.

BUG=chromium:620320
LOG=N

Original issue's description:
> [heap] Add page evacuation mode for new->new
> 
> Adds an evacuation mode that allows moving pages within new space without
> copying objects.
> 
> Basic idea:
> a) Move page within new space
> b) Sweep page to make iterable and process ArrayBuffers
> c) Finish sweep till next scavenge
> 
> Threshold is currently 70% live bytes, i.e., the same threshold we use
> to determine fragmented pages.
> 
> BUG=chromium:581412
> LOG=N
>
CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_tsan_rel,v8_mac64_asan_rel
> 
> Committed: https://crrev.com/49b23201671b25092a3c22eb85783f39b95a5f87
> Cr-Commit-Position: refs/heads/master@{#36990}

TBR=ulan@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:581412
==========

to

==========
Revert of [heap] Add page evacuation mode for new->new (patchset #18 id:440001
of https://codereview.chromium.org/1957323003/ )

Reason for revert:
Fragmentation of LABs could result in increasing memory usage (pages) instead of
shrinking.

BUG=chromium:620320
LOG=N

Original issue's description:
> [heap] Add page evacuation mode for new->new
> 
> Adds an evacuation mode that allows moving pages within new space without
> copying objects.
> 
> Basic idea:
> a) Move page within new space
> b) Sweep page to make iterable and process ArrayBuffers
> c) Finish sweep till next scavenge
> 
> Threshold is currently 70% live bytes, i.e., the same threshold we use
> to determine fragmented pages.
> 
> BUG=chromium:581412
> LOG=N
>
CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_tsan_rel,v8_mac64_asan_rel
> 
> Committed: https://crrev.com/49b23201671b25092a3c22eb85783f39b95a5f87
> Cr-Commit-Position: refs/heads/master@{#36990}

TBR=ulan@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:581412
==========

[commit-bot: I haz the power, 2016-06-16 16:52:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-16 16:55:54]

Description was changed from

==========
Revert of [heap] Add page evacuation mode for new->new (patchset #18 id:440001
of https://codereview.chromium.org/1957323003/ )

Reason for revert:
Fragmentation of LABs could result in increasing memory usage (pages) instead of
shrinking.

BUG=chromium:620320
LOG=N

Original issue's description:
> [heap] Add page evacuation mode for new->new
> 
> Adds an evacuation mode that allows moving pages within new space without
> copying objects.
> 
> Basic idea:
> a) Move page within new space
> b) Sweep page to make iterable and process ArrayBuffers
> c) Finish sweep till next scavenge
> 
> Threshold is currently 70% live bytes, i.e., the same threshold we use
> to determine fragmented pages.
> 
> BUG=chromium:581412
> LOG=N
>
CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_tsan_rel,v8_mac64_asan_rel
> 
> Committed: https://crrev.com/49b23201671b25092a3c22eb85783f39b95a5f87
> Cr-Commit-Position: refs/heads/master@{#36990}

TBR=ulan@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:581412
==========

to

==========
Revert of [heap] Add page evacuation mode for new->new (patchset #18 id:440001
of https://codereview.chromium.org/1957323003/ )

Reason for revert:
Fragmentation of LABs could result in increasing memory usage (pages) instead of
shrinking.

BUG=chromium:620320
LOG=N

Original issue's description:
> [heap] Add page evacuation mode for new->new
>
> Adds an evacuation mode that allows moving pages within new space without
> copying objects.
>
> Basic idea:
> a) Move page within new space
> b) Sweep page to make iterable and process ArrayBuffers
> c) Finish sweep till next scavenge
>
> Threshold is currently 70% live bytes, i.e., the same threshold we use
> to determine fragmented pages.
>
> BUG=chromium:581412
> LOG=N
>
CQ_EXTRA_TRYBOTS=tryserver.v8:v8_linux_arm64_gc_stress_dbg,v8_linux_gc_stress_dbg,v8_mac_gc_stress_dbg,v8_linux64_tsan_rel,v8_mac64_asan_rel
>
> Committed: https://crrev.com/49b23201671b25092a3c22eb85783f39b95a5f87
> Cr-Commit-Position: refs/heads/master@{#36990}

TBR=ulan@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:581412

Committed: https://crrev.com/2263ee9bf4e5aa341cbac547add68a2105963477
Cr-Commit-Position: refs/heads/master@{#37042}
==========

[commit-bot: I haz the power, 2016-06-16 16:55:55]

Patchset 1 (id:??) landed as
https://crrev.com/2263ee9bf4e5aa341cbac547add68a2105963477
Cr-Commit-Position: refs/heads/master@{#37042}