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Add explanation about forgetFunc in cacher

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wojtekt 2019-03-27 08:24:45 +01:00
parent f6c51d6e99
commit 605522b0c7
1 changed files with 2 additions and 0 deletions
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staging/src/k8s.io/apiserver/pkg/storage/cacher/cacher.go
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@ -365,6 +365,8 @@ func (c *Cacher) Watch(ctx context.Context, key string, resourceVersion string,
// Create a watcher here to reduce memory allocations under lock, // Create a watcher here to reduce memory allocations under lock,
// given that memory allocation may trigger GC and block the thread. // given that memory allocation may trigger GC and block the thread.
// Also note that emptyFunc is a placeholder, until we will be able
// to compute watcher.forget function (which has to happen under lock).
watcher := newCacheWatcher(chanSize, filterWithAttrsFunction(key, pred), emptyFunc, c.versioner) watcher := newCacheWatcher(chanSize, filterWithAttrsFunction(key, pred), emptyFunc, c.versioner)
// We explicitly use thread unsafe version and do locking ourself to ensure that // We explicitly use thread unsafe version and do locking ourself to ensure that