Messages in this thread Patch in this message | | | Subject | [PATCH] swiotlb: add kernel error message to track iobtlb overflow buffer usage | From | Shuah Khan <> | Date | Fri, 31 Aug 2012 18:55:59 -0600 |
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Add kernel error message to track iotlb overflow buffer triggers to understand how often the overflow buffer gets used.
Signed-off-by: Shuah Khan <shuah.khan@hp.com> --- lib/swiotlb.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/lib/swiotlb.c b/lib/swiotlb.c index 45bc1f8..597d7b9 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -682,6 +682,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, if (!map) { swiotlb_full(dev, size, dir, 1); map = io_tlb_overflow_buffer; + dev_err(dev, "SWIOTLB is full. Mapping overflow buffer.\n"); } dev_addr = swiotlb_virt_to_bus(dev, map); -- 1.7.9.5
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