Commit e19f8fa6 authored by Rob Clark's avatar Rob Clark Committed by Christoph Hellwig
Browse files

dma-debug: make things less spammy under memory pressure 



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: default avatarRob Clark <robdclark@chromium.org>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 4a37f3dd

kernel/dma/debug.c

+1 −1
Original line number Diff line number Diff line
@@ -564,7 +564,7 @@ static void add_dma_entry(struct dma_debug_entry *entry, unsigned long attrs) 


	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;

	} else if (rc == -EEXIST && !(attrs & DMA_ATTR_SKIP_CPU_SYNC)) {

		err_printk(entry->dev, entry,