> Here's a patch to make it so empty PTEs are not added to mmu_gathers.
> This is useful on machines with sparse memory. This has been tested on
> ia64 and x86. Patch is against 2.4.21-bk.
The patch looks good. We will still flush everything in the
TLB that we used to flush before, but by not using struct
page in the buffer for non-existant and reserved pages we can
flush the TLB in much larger intervals.
Marcelo, could you please apply this patch for 2.4.22-pre ?
(I'll keep a copy here and will resend it to you if needed)
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