On Thu, 2016-05-19 at 13:34 -0400, Neil Horman wrote: > On Thu, May 19, 2016 at 08:48:56AM -0700, Eric Dumazet wrote: > > On Thu, 2016-05-19 at 11:30 -0400, Neil Horman wrote: > > > Noticed an allocation failure in a network driver the other day on a 32 > > > bit > > > system: > > > > Presumably driver could fall back to HIGH memory allocation for the page > > frag. > > > Is that safe on a 32 bit system? > Neil
This should be. Unless a bug somewhere was added, since most dev are using 64bit kernels these days. All frag consumers use the appropriate kmap_atomic()/kunmap_atomic() pairs before copying data from a page frag. Meaning the page can be in HIGH memory.
