Commit cd8c1e6c authored Jun 01, 2022 by Rob Clark Committed by Greg Kroah-Hartman Jun 22, 2022

dma-debug: make things less spammy under memory pressure



[ Upstream commit e19f8fa6ce1ca9b8b934ba7d2e8f34c95abc6e60 ]

Limit the error msg to avoid flooding the console.  If you have a lot of
threads hitting this at once, they could have already gotten passed the
dma_debug_disabled() check before they get to the point of allocation
failure, resulting in quite a lot of this error message spamming the
log.  Use pr_err_once() to limit that.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent a45e19fd

kernel/dma/debug.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -616,7 +616,7 @@ static void add_dma_entry(struct dma_debug_entry *entry)

		rc = active_cacheline_insert(entry);
		if (rc == -ENOMEM) {
		pr_err("cacheline tracking ENOMEM, dma-debug disabled\n");
		pr_err_once("cacheline tracking ENOMEM, dma-debug disabled\n");
		global_disable = true;
		}