Commit ef465014 authored Oct 13, 2017 by Boris Brezillon Committed by Linus Torvalds Oct 13, 2017

mm/cma.c: take __GFP_NOWARN into account in cma_alloc()

cma_alloc() unconditionally prints an INFO message when the CMA
allocation fails.  Make this message conditional on the non-presence of
__GFP_NOWARN in gfp_mask.

This patch aims at removing INFO messages that are displayed when the
VC4 driver tries to allocate buffer objects.  From the driver
perspective an allocation failure is acceptable, and the driver can
possibly do something to make following allocation succeed (like
flushing the VC4 internal cache).

Link: http://lkml.kernel.org/r/20171004125447.15195-1-boris.brezillon@free-electrons.com


Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Laura Abbott <labbott@redhat.com>
Cc: Jaewon Kim <jaewon31.kim@samsung.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Eric Anholt <eric@anholt.net>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 51962a9d

mm/cma.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -460,7 +460,7 @@ struct page cma_alloc(struct cma cma, size_t count, unsigned int align,

		trace_cma_alloc(pfn, page, count, align);

		if (ret) {
		if (ret && !(gfp_mask & __GFP_NOWARN)) {
		pr_info("%s: alloc failed, req-size: %zu pages, ret: %d\n",
		__func__, count, ret);
		cma_debug_show_areas(cma);

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