| Message ID | 1345459648-24263-3-git-send-email-m.szyprowski@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi, On Mon, Aug 20, 2012 at 12:47:27PM +0200, Marek Szyprowski wrote: > @@ -461,6 +461,9 @@ static void *__alloc_from_pool(size_t size, struct page **ret_page) > bitmap_set(pool->bitmap, pageno, count); > ptr = pool->vaddr + PAGE_SIZE * pageno; > *ret_page = pool->page + pageno; > + } else { > + pr_err("Atomic coherent pool too small!\n" > + "Please increase it with coherent_pool= kernel parameter!\n"); This should be rate limited, perhaps even printed only once. A.
Hello, On Tuesday, August 21, 2012 1:01 AM Aaro Koskinen wrote: > On Mon, Aug 20, 2012 at 12:47:27PM +0200, Marek Szyprowski wrote: > > @@ -461,6 +461,9 @@ static void *__alloc_from_pool(size_t size, struct page **ret_page) > > bitmap_set(pool->bitmap, pageno, count); > > ptr = pool->vaddr + PAGE_SIZE * pageno; > > *ret_page = pool->page + pageno; > > + } else { > > + pr_err("Atomic coherent pool too small!\n" > > + "Please increase it with coherent_pool= kernel parameter!\n"); > > This should be rate limited, perhaps even printed only once. Ok, I will change it to pr_err_once(). Best regards
On Mon, 20 Aug 2012 12:47:27 +0200 Marek Szyprowski <m.szyprowski@samsung.com> wrote: > Print a loud warning when system runs out of memory from atomic coherent > pool to let users notice the potential problem. > > Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi> > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> > --- > arch/arm/mm/dma-mapping.c | 3 +++ > 1 files changed, 3 insertions(+), 0 deletions(-) > > diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c > index d1cc9c1..25963ea 100644 > --- a/arch/arm/mm/dma-mapping.c > +++ b/arch/arm/mm/dma-mapping.c > @@ -461,6 +461,9 @@ static void *__alloc_from_pool(size_t size, struct page **ret_page) > bitmap_set(pool->bitmap, pageno, count); > ptr = pool->vaddr + PAGE_SIZE * pageno; > *ret_page = pool->page + pageno; > + } else { > + pr_err("Atomic coherent pool too small!\n" > + "Please increase it with kernel parameter!\n"); It might be a little bit nicer if the current pool size is printed in the above too. That could be the hint for how much to specify in "coherent_pool=".
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index d1cc9c1..25963ea 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -461,6 +461,9 @@ static void *__alloc_from_pool(size_t size, struct page **ret_page) bitmap_set(pool->bitmap, pageno, count); ptr = pool->vaddr + PAGE_SIZE * pageno; *ret_page = pool->page + pageno; + } else { + pr_err("Atomic coherent pool too small!\n" + "Please increase it with coherent_pool= kernel parameter!\n"); } spin_unlock_irqrestore(&pool->lock, flags);
Print a loud warning when system runs out of memory from atomic coherent pool to let users notice the potential problem. Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- arch/arm/mm/dma-mapping.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-)