| commit | 55ec5182d7b84eb2461c495a55984162b23f3df8 | [log] [tgz] |
|---|---|---|
| author | Michael Anthony Knyszek <mknyszek@google.com> | Thu Nov 21 17:05:14 2019 +0000 |
| committer | Michael Knyszek <mknyszek@google.com> | Fri May 08 16:24:40 2020 +0000 |
| tree | 87d24203820c776f090d73e93fd931cbfdcffdb4 | |
| parent | b1a48af7e8ee87cc46e1bbb07f81ac4853e0f27b [diff] |
runtime: remove scavAddr in favor of address ranges This change removes the concept of s.scavAddr in favor of explicitly reserving and unreserving address ranges. s.scavAddr has several problems with raciness that can cause the scavenger to miss updates, or move it back unnecessarily, forcing future scavenge calls to iterate over searched address space unnecessarily. This change achieves this by replacing scavAddr with a second addrRanges which is cloned from s.inUse at the end of each sweep phase. Ranges from this second addrRanges are then reserved by scavengers (with the reservation size proportional to the heap size) who are then able to safely iterate over those ranges without worry of another scavenger coming in. Fixes #35788. Change-Id: Ief01ae170384174875118742f6c26b2a41cbb66d Reviewed-on: https://go-review.googlesource.com/c/go/+/208378 Run-TryBot: Michael Knyszek <mknyszek@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Austin Clements <austin@google.com>
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