Messages in this thread | | | Date | Fri, 18 Jul 2014 09:51:32 -0400 | From | Steven Rostedt <> | Subject | Re: [PATCH ftrace/core v3 2/3] ftrace, kprobes: Support IPMODIFY flag to find IP modify conflict |
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On Fri, 18 Jul 2014 16:09:07 +0900 Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> wrote:
> > "The ops can modify the IP register. This can only be set along with > > SAVE_REGS. If another ops is already registered for any of the > > functions that this ops will be registered for, then this ops will fail > > to register." > > Not only register, but also set_filter_ip ;) > "...will fail to register or set_filter_ip."
Sure.
> >> diff --git a/kernel/kprobes.c b/kernel/kprobes.c > >> index 3214289..e52d86f 100644 > >> --- a/kernel/kprobes.c > >> +++ b/kernel/kprobes.c > > > > I think this should be split into two patches. One that adds the ftrace > > infrastructure, and the other that adds the kprobes user of the > > IPMODIFY flag. > > Hmm, I thought that it was natural to introduce new feature and its user > together, so that we could use git-bisect safely.
It should still be bisect friendly. That is, the feature is added before the user, not the user before the feature ;-)
I know some people like the feature and user in one patch, but for me, when the user is in a different sub system (here it's kprobes) from the infrastructure that is changing (ftrace), I prefer separate patches.
The user patch shows me where the users are. When they are one patch, I tend to have them get lost.
-- Steve
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