[Ocfs2-devel] [PATCH 5/5] ocfs2: Remove mlog(0) from fs/ocfs2/alloc.c
Tao Ma
tao.ma at oracle.com
Wed Nov 10 06:39:25 PST 2010
Joel Becker wrote:
> On Wed, Nov 10, 2010 at 10:52:23AM +0800, Tao Ma wrote:
>
>> So this patch removes all mlog(0,...) from alloc.c and adds
>> the corresponding tracepoints. Different mlogs have different
>> solutions.
>> 1. Some are replaced with trace event directly.
>> 2. Some are replaced and some new parameters are added since
>> I think we need to know the btree owner in that case.
>> 3. Some are combined into one trace events.
>> 4. Some redundant mlogs are removed.
>>
>
> These decisions are what I stressed to Wengang when he did his
> first pass. I don't want to log data just because it used to have an
> mlog(). We should only be logging things that are interesting.
>
yeah, that is also my thought. So I will only change those mlog(0,...)
that I think I am familar with and
leave others there(I guess I won't touch dlm, cluster and dlmglue).
> In this patch, I see a lot of things that make sense. "Hey,
> we're growing the tree" is a good thing to log. So I'm not saying that
> you did anything wrong. I'm just mentioning my goals up front to be
> clear.
> Overall, the patch looks good.
>
Glad to hear that. So I will continue. I guess I can work on most files
under fs/ocfs2/ except dlmglue.c. ;)
>
>> What's more, it defines some event classes so that we can use
>> them later.
>>
>
> This is cool.
>
yeah, they are really cool.
Regards,
Tao
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