A recent debugging session would have been made a little bit easier if we had noticed sooner that swiotlb_exit() was being called during boot.
Add a simple diagnostic message to swiotlb_exit() to complement the one from swiotlb_print_info() during initialisation. Cc: Claire Chang <tien...@chromium.org> Cc: Christoph Hellwig <h...@lst.de> Cc: Robin Murphy <robin.mur...@arm.com> Link: https://lore.kernel.org/r/20210705190352.GA19461@willie-the-truck Suggested-by: Konrad Rzeszutek Wilk <konrad.w...@oracle.com> Tested-by: Nathan Chancellor <nat...@kernel.org> Tested-by: Claire Chang <tien...@chromium.org> Reviewed-by: Christoph Hellwig <h...@lst.de> Signed-off-by: Will Deacon <w...@kernel.org> --- kernel/dma/swiotlb.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 7948f274f9bb..b3c793ed9e64 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -334,6 +334,7 @@ void __init swiotlb_exit(void) if (!mem->nslabs) return; + pr_info("tearing down default memory pool\n"); size = array_size(sizeof(*mem->slots), mem->nslabs); if (mem->late_alloc) free_pages((unsigned long)mem->slots, get_order(size)); -- 2.32.0.402.g57bb445576-goog _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
