Re: [RFC PATCH v3 0/3] Introduce BPF map tracing capability
From: Jamal Hadi Salim <jhs@mojatatu.com>
Date: 2021-11-04 11:09:42
Also in:
bpf, lkml
From: Jamal Hadi Salim <jhs@mojatatu.com>
Date: 2021-11-04 11:09:42
Also in:
bpf, lkml
On 2021-11-04 06:59, Jamal Hadi Salim wrote:
On 2021-11-03 13:12, Joe Burton wrote:quoted
That's a good point. Since the probe is invoked before the update takes place, it would not be possible to account for the possibility that the update failed. Unless someone wants the `pre update' hook, I'll simply adjust the existing hooks' semantics so that they are invoked after the update. As discussed, this better suits the intended use case.If the goal is to synchronize state between two maps (if i understood correctly the intent) then it is more useful to go post-update.
To complete that thought: Only positive results are interesting. For example if the command was to delete an entry which doesnt exist there is no point in reporting that (or is there?). OTOH, a successful delete is useful... cheers, jamal