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2.6.37 merge window, part 12.6.37 merge window, part 1Posted Nov 1, 2010 10:29 UTC (Mon) by dlang (✭ supporter ✭, #313)In reply to: 2.6.37 merge window, part 1 by i3839 Parent article: 2.6.37 merge window, part 1
I thought that the big advantage of the 4K page was the ability to allocate a single page instead of needing to allocate a pair of pages (order 0 allocation instead of order 1 allocation), greatly reducing the problem of memory fragmentation.
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2.6.37 merge window, part 1 Posted Nov 1, 2010 17:33 UTC (Mon) by i3839 (guest, #31386) [Link]
The chance that you can't allocate two contiguous pages is fairly small. we're talking about the stack page here, so it's one per task, which isn't much. Fragmentation is more a problem for bigger allocations than order 1, for allocations that may not fail, and for very frequent allocations. The task stack is neither of those, so it's fine.
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