> multi-occur can do this kind of thing.
> C-u M-x multi-occur-in-matching-buffers RET . RET foo (bar) RET

 You are right!

  Having several ways to solve a problem, letting you to choose the one you

 like more is generally a good thing.

*) multi-occur-in-matching-buffers is certainly a more general solution (don't require

    the user being familiar with Ibuffer).

*) The ibuffer approach it could be more suitable for people using ibuffer or dired.

On Fri, Jun 10, 2016 at 2:24 AM, Glenn Morris <rgm@gnu.org> wrote:

Tino Calancha wrote:

> It's commun one Emacs session having dozens of buffers on memory. On
> such situation, it is hard to remember the name of one particular
> buffer.
>
> It may be useful having easy way to search buffers by content.

multi-occur can do this kind of thing.

> For example, one user is developping a funtion foo
> in the buffer BUF, with name BUF-NAME:
>
> foo-type foo (bar)
>
> The user may not remember BUF-NAME, but s/he could be able
> to write a regexp matching just the content of BUF.
> For instance, something like
> "foo (bar)"
> likely would match just BUF content (or a few buffers more).


C-u M-x multi-occur-in-matching-buffers RET . RET foo (bar) RET