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control/controlclient: free memory on iOS before full netmap work

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Updates tailscale/corp#18514

Change-Id: I8d0330334b030ed8692b25549a0ee887ac6d7188
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2024-03-21 10:47:31 -07:00 committed by Brad Fitzpatrick
parent e0f97738ee
commit f45594d2c9
1 changed files with 8 additions and 0 deletions
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8
control/controlclient/map.go
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@ -11,6 +11,8 @@
"maps"
"net"
"reflect"
"runtime"
"runtime/debug"
"slices"
"sort"
"strconv"
@ -187,6 +189,12 @@ func (ms *mapSession) HandleNonKeepAliveMapResponse(ctx context.Context, resp *t
// our UpdateFullNetmap call). This is the part we tried to avoid but
// some field mutations (especially rare ones) aren't yet handled.
if runtime.GOOS == "ios" {
// Memory is tight on iOS. Free what we can while we
// can before this potential burst of in-use memory.
debug.FreeOSMemory()
}
nm := ms.netmap()
ms.lastNetmapSummary = nm.VeryConcise()
ms.occasionallyPrintSummary(ms.lastNetmapSummary)