Messages in this thread | | | Date | Thu, 26 Mar 2009 20:38:43 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: Linux 2.6.29 |
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On Thu, 26 Mar 2009, Andrew Morton wrote: > > Why does everyone just sit around waiting for the kernel to put a new > value into two magic numbers which userspace scripts could have set? > > My /etc/rc.local has been tweaking dirty_ratio, dirty_background_ratio > and swappiness for many years. I guess I'm just incredibly advanced.
.. and as a result you're also testing something that nobody else is.
Look at the complaints from people about fsync behavior that Ted says he cannot see. Let me guess: it's because Ted probably has tweaked his environment, because he is advanced. As a result, other people see problems, he does not.
That's not "advanced". That's totally f*cking broken.
Having different distributions tweak all those tweakables is just even _more_ so. It's the anti-thesis of "advanced". It's just stupid.
We should aim to get it right. The "user space can tweak any numbers they want" is ALWAYS THE WRONG ANSWER. It's a cop-out, but more importantly, it's a cop-out that doesn't even work, and that just results in everybody having different setups. Then nobody is happy.
Linus
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