Re: [GIT PULL] perf fixes

From: Linus Torvalds
Date: Mon Jan 24 2011 - 15:28:22 EST

On Tue, Jan 25, 2011 at 6:17 AM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> It only happens for me with "g". With "perf record -af sleep 10" it worked.

Actually, it's something subtler than that. It must depend on the
actual data, because now when I tried it again, it worked with 'g'
too. I hadn't saved the old that caused the lockup (it got
overwritten by the non-g test), and now when I try to re-create it it
doesn't hang on the result.

So it's probably some very specific data pattern that causes it.

(And I don't know if it's a hard hang - it could just be something
_very_ slow. But we're talking half a minute kind of slow).

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