tree 266bcd52947c4b4d79625e85a6f690f78c7059db
parent 73317080e12234defb59f84e2b5b15f69650b5d5
author Michael Anthony Knyszek <mknyszek@google.com> 1568141631 +0000
committer Michael Knyszek <mknyszek@google.com> 1573154078 +0000

runtime: count scavenged bits for new allocation for new page allocator

This change makes it so that the new page allocator returns the number
of pages that are scavenged in a new allocation so that mheap can update
memstats appropriately.

The accounting could be embedded into pageAlloc, but that would make
the new allocator more difficult to test.

Updates #35112.

Change-Id: I0f94f563d7af2458e6d534f589d2e7dd6af26d12
Reviewed-on: https://go-review.googlesource.com/c/go/+/195698
Reviewed-by: Austin Clements <austin@google.com>