Commit c65d315d authored Apr 20, 2017 by Neeraj Soni Committed by Prasad Sodagudi Jun 15, 2017

soc: qcom: Request GFP_NOIO for effective memory reclaim



Request for memory with GFP_NOIO so that new IO
request is not raised while reclaiming the memory when
system is having low memory. With GFP_KERNEL a deadlock
is possible with scm function requsting for memory during
PFK operation intiated by block layer through storage
driver. With low memory system will try to
reclaim some memory. If GFP_KERNEL is used this
will lead to IO operation through storage driver
which is already serving PFK encryption call hence
can not take up this IO request causing deadlock.

Change-Id: I1a4abbea31f430ca5f8ba030babf958a9ab51fdf
Signed-off-by: Neeraj Soni <neersoni@codeaurora.org>
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>

parent 3768447d

drivers/soc/qcom/scm.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -652,7 +652,7 @@ int scm_call2(u32 fn_id, struct scm_desc *desc)
		if (unlikely(!is_scm_armv8()))
		return -ENODEV;

		ret = allocate_extra_arg_buffer(desc, GFP_KERNEL);
		ret = allocate_extra_arg_buffer(desc, GFP_NOIO);
		if (ret)
		return ret;