On 27/08/2012 07:19, Peter Zijlstra wrote:

On Sun, 2012-08-26 at 13:11 +0300, Haggai Eran wrote:

quoted

The conversion of the locks taken for reverse map scanning would
require taking sleeping locks in free_pgtables() and we cannot sleep
while gathering pages for a tlb flush. 

We can.

After further reading I tend to agree. We can drop this patch and patch
number 3 then and focus on the first patch in this set.

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