Messages in this thread | | | Date | Mon, 29 Apr 2013 20:48:17 -0400 | From | Rik van Riel <> | Subject | Re: IO regression after ab8fabd46f on x86 kernels with high memory |
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On 04/29/2013 06:03 PM, Linus Torvalds wrote:
> Seriously, you can compile yourself a 64-bit kernel and continue to > use your 32-bit user-land. And you can complain to whatever distro you > used that it didn't do that in the first place. But we're not going to > bother with trying to tune PAE for some particular load. It's just not > worth it to anybody.
I can think of one way to "tune PAE" that will help avoid the breakage, and at the same time draw the attention of users.
Limit the memory that a 32 bit PAE kernel uses, to something small enough where the user will not encounter random breakage. Maybe 8 or 12GB?
It could also print out a friendly message, to inform the user they should upgrade to a 64 bit kernel to enjoy the use of all of their memory.
It is a bit of a heavy stick, but I suspect that it would clue in all of the affected users.
If you have no objection to this, I'll whip up a patch.
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