Re: [linuxsh-dev] BUG fix for VMALLOC-ed page

[Greg B. <gb...@po...>]

NIIBE Yutaka wrote:
> 
> My point is __not__:
>         BIOS should set PCMCIA, kernel should not know about it.
> 
> But:
>         If there're "wired" TLB entries, it's safe and better not
>         to destroy them.
> 
> Most likely case is booting from ATA-card or Compact Flash, and
> running on the file system on the card as if it's real ATA drive.  In
> that case, BIOS enables MMU and sets a wired entry for I/O access.

  Ok now I get it, when you boot from a PCMCIA medium you can't afford
to touch the TLB entries that are being used to load your kernel/initrd.
Duh.  I had the "boot from onboard FLASH" scenario wedged firmly in my
mind for some reason.

Greg.
-- 
These are my opinions not PPIs.