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Message-Id: <1388505254-2986-1-git-send-email-konrad.wilk@oracle.com> Date: Tue, 31 Dec 2013 10:54:14 -0500 From: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> To: linux-kernel@...r.kernel.org Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>, Stefano Stabellini <stefano.stabellini@...citrix.com> Subject: [PATCH] swiotlb: Don't DoS us with 'swiotlb buffer is full' There is no need for that so lets use ratelimiting. Also add some extra information to be helpful. CC: Stefano Stabellini <stefano.stabellini@...citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com> --- lib/swiotlb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/lib/swiotlb.c b/lib/swiotlb.c index e4399fa..7c97bd2 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -505,7 +505,8 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, not_found: spin_unlock_irqrestore(&io_tlb_lock, flags); - dev_warn(hwdev, "swiotlb buffer is full\n"); + if (printk_ratelimit()) + dev_warn(hwdev, "swiotlb buffer is full (sz: %ld bytes)\n", size); return SWIOTLB_MAP_ERROR; found: spin_unlock_irqrestore(&io_tlb_lock, flags); -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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