Messages in this thread | | | From | Jann Horn <> | Date | Fri, 28 Jan 2022 04:00:34 +0100 | Subject | Re: [PATCH net] net: dev: Detect dev_hold() after netdev_wait_allrefs() |
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On Fri, Jan 28, 2022 at 3:53 AM Eric Dumazet <edumazet@google.com> wrote: > On Thu, Jan 27, 2022 at 6:48 PM Jann Horn <jannh@google.com> wrote: > > > When someone is using NET_DEV_REFCNT_TRACKER for slow debugging, they > > should also be able to take the performance hit of > > CONFIG_PCPU_DEV_REFCNT and rely on the normal increment-from-zero > > detection of the generic refcount code, right? (Maybe > > NET_DEV_REFCNT_TRACKER should depend on !CONFIG_PCPU_DEV_REFCNT?) > > NET_DEV_REFCNT_TRACKER is not slow, I think it has neglectable cost really. > (I could not see any difference in my tests)
Ah, sorry. I misread the Kconfig text.
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