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2015-07-17mm/cma_debug: correct size input to bitmap functionJoonsoo Kim1-3/+4
In CMA, 1 bit in bitmap means 1 << order_per_bits pages so size of bitmap is cma->count >> order_per_bits rather than just cma->count. This patch fixes it. Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Acked-by: Michal Nazarewicz <mina86@mina86.com> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Stefan Strogin <stefan.strogin@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-07-17mm/cma_debug: fix debugging alloc/free interfaceJoonsoo Kim1-2/+2
CMA has alloc/free interface for debugging. It is intended that alloc/free occurs in specific CMA region, but, currently, alloc/free interface is on root dir due to the bug so we can't select CMA region where alloc/free happens. This patch fixes this problem by making alloc/free interface per CMA region. Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Acked-by: Michal Nazarewicz <mina86@mina86.com> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Stefan Strogin <stefan.strogin@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-15mm/cma_debug.c: remove blank lines before DEFINE_SIMPLE_ATTRIBUTE()Andrew Morton1-5/+0
Like EXPORT_SYMBOL(): the positioning communicates that the macro pertains to the immediately preceding function. Cc: Dmitry Safonov <d.safonov@partner.samsung.com> Cc: Michal Nazarewicz <mina86@mina86.com> Cc: Stefan Strogin <stefan.strogin@gmail.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Pintu Kumar <pintu.k@samsung.com> Cc: Weijie Yang <weijie.yang@samsung.com> Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Cc: Vyacheslav Tyrtov <v.tyrtov@samsung.com> Cc: Aleksei Mateosian <a.mateosian@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-15mm: cma: add functions to get region pages countersDmitry Safonov1-0/+40
Here are two functions that provide interface to compute/get used size and size of biggest free chunk in cma region. Add that information to debugfs. [akpm@linux-foundation.org: move debug code from cma.c into cma_debug.c] [stefan.strogin@gmail.com: move code from cma_get_used() and cma_get_maxchunk() to cma_used_get() and cma_maxchunk_get()] Signed-off-by: Dmitry Safonov <d.safonov@partner.samsung.com> Signed-off-by: Stefan Strogin <stefan.strogin@gmail.com> Acked-by: Michal Nazarewicz <mina86@mina86.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Pintu Kumar <pintu.k@samsung.com> Cc: Weijie Yang <weijie.yang@samsung.com> Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Cc: Vyacheslav Tyrtov <v.tyrtov@samsung.com> Cc: Aleksei Mateosian <a.mateosian@samsung.com> Signed-off-by: Stefan Strogin <stefan.strogin@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-14mm-cma-allocation-trigger-fixAndrew Morton1-1/+1
s/CONFIG_CMA_ALIGNMENT/0/, per Joonsoo Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Laura Abbott <lauraa@codeaurora.org> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-14mm: cma: release triggerSasha Levin1-0/+58
Provides a userspace interface to trigger a CMA release. Usage: echo [pages] > free This would provide testing/fuzzing access to the CMA release paths. [akpm@linux-foundation.org: coding-style fixes] [mhocko@suse.cz: fix build] Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Acked-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Laura Abbott <lauraa@codeaurora.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Michal Hocko <mhocko@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-14mm: cma: allocation triggerSasha Levin1-1/+53
Provides a userspace interface to trigger a CMA allocation. Usage: echo [pages] > alloc This would provide testing/fuzzing access to the CMA allocation paths. Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Acked-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Laura Abbott <lauraa@codeaurora.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-14mm: cma: debugfs interfaceSasha Levin1-0/+60
I've noticed that there is no interfaces exposed by CMA which would let me fuzz what's going on in there. This small patchset exposes some information out to userspace, plus adds the ability to trigger allocation and freeing from userspace. This patch (of 3): Implement a simple debugfs interface to expose information about CMA areas in the system. Useful for testing/sanity checks for CMA since it was impossible to previously retrieve this information in userspace. Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Acked-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Laura Abbott <lauraa@codeaurora.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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