Re: [PATCH] mm readahead: Fix sys_readahead breakage by reverting 2MB limit (bug 79111)

[Raghavendra K T]

On 07/03/2014 11:52 PM, Linus Torvalds wrote:
> On Thu, Jul 3, 2014 at 11:11 AM, Raghavendra K T
> <raghavendra.kt@xxxxxxxxxxxxxxxxxx> wrote:
> > > If this comes from some man-page,
> >
> > Yes it is.
>
> Ok, googling actually finds a fairly recent patch to fix it
>
>     http://www.spinics.net/lists/linux-mm/msg70517.html
>
> and several much older "that's not true" comments.

Thanks. I had missed that.

> That said, the bugzilla entry you mentioned does mention "can't boot
> 3.14 now". I'm not sure what the meaning of that sentence is, though.
> Does it mean "can't boot 3.14 to test it because the machine is busy",
> or is it a typo and really meant 3.15, and that some bootup script
> *depended* on readahead()? I don't know. It seems strange.

I think your guess is right, it meant to say "I can't boot it anymore
since I already upgraded to 3.15", because eventually bootup script (if
it is) should have to read IIUC.


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