Use MAP_ANONYMOUS|MAP_SHARED instead of unlinked file in /tmp #32
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On a large machine we noticed the shared mapping for statistics gathering was causing significant amounts of file I/O. I have no idea why I used an unlinked file to create the shared area in initialise_shared_area(). Use a MAP_ANONYMOUS|MAP_SHARED mmap instead. I've made it as Linux only for now. Signed-off-by: Anton Blanchard <anton@ozlabs.org>
We want each page to be node local, so disable THP. Signed-off-by: Anton Blanchard <anton@ozlabs.org>
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On a large machine we noticed the shared mapping for statistics
gathering was causing significant amounts of file I/O. I have no idea
why I used an unlinked file to create the shared area in
initialise_shared_area().
Use a MAP_ANONYMOUS|MAP_SHARED mmap instead. I've made it as Linux only
for now.
Signed-off-by: Anton Blanchard anton@ozlabs.org