min_free_pages is critical for correctness, document it as such.
Signed-off-by: Pavel Machek <firstname.lastname@example.org>
index a0ccc5b..e460c19 100644
@@ -111,6 +111,12 @@ of kilobytes free. The VM uses this num
value for each lowmem zone in the system. Each lowmem zone gets
a number of reserved free pages based proportionally on its size.
+Some minimal ammount of memory is needed to satisfy PF_MEMALLOC
+allocations; if you set this to lower than 1024KB, your system will
+become subtly broken, and prone to deadlock under high loads.
+Setting this too high will OOM your machine instantly.
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html