Highmem issues with MMC filesystem

[Nicolas Pitre]

On Fri, 19 Mar 2010, Russell King - ARM Linux wrote:

> On Fri, Mar 19, 2010 at 02:27:24PM -0400, Nicolas Pitre wrote:
> > But on ARMv6 this is different.  The L1 cache is VIPT and it therefore 
> > doesn't have to be flushed as often as a VIVT cache.  Still, as far as I 
> > know, the highmem code currently always flush any page to be unmapped.  
> > But somewhere somehow an unmapped highmem page becomes subject to DMA 
> > and apparently can still be L1 cached.
> 
> This does not explain the corrupted ext2 metadata, which is in lowmem
> pages.

Please could you forget about EXT2 for now?  Let's pretend I never 
mentioned it.  As a matter of fact I can,t see EXT2 errors anymore in 
the flood of user space segfaults.


Nicolas
> Let's get a fresh set of clear bug reports giving all relevant information.
> Let's not continue to scatter small little bits of information in multiple
> emails.

I think I did, less than 30 minutes ago.


Nicolas