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authorPeter Zijlstra <peterz@infradead.org>2011-07-28 08:43:51 (GMT)
committerScott Wood <scottwood@freescale.com>2014-05-14 18:38:43 (GMT)
commitff45b3aafef7c71aad0bb7663ba36b8aa67ba9d8 (patch)
tree5bddc08f04a0627fb59c741b11873a315b89f8d1 /firmware/r128
parent9d2f60c44d79b680124e4c35a14d07051b50d2d4 (diff)
downloadlinux-fsl-qoriq-ff45b3aafef7c71aad0bb7663ba36b8aa67ba9d8.tar.xz
mm, rt: kmap_atomic scheduling
In fact, with migrate_disable() existing one could play games with kmap_atomic. You could save/restore the kmap_atomic slots on context switch (if there are any in use of course), this should be esp easy now that we have a kmap_atomic stack. Something like the below.. it wants replacing all the preempt_disable() stuff with pagefault_disable() && migrate_disable() of course, but then you can flip kmaps around like below. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> [dvhart@linux.intel.com: build fix] Link: http://lkml.kernel.org/r/1311842631.5890.208.camel@twins [tglx@linutronix.de: Get rid of the per cpu variable and store the idx and the pte content right away in the task struct. Shortens the context switch code. ]
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