From: Will Deacon <will@kernel.org>
To: iommu@lists.linux-foundation.org
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Will Deacon <will@kernel.org>,
linux-kernel@vger.kernel.org,
Nathan Chancellor <nathan@kernel.org>,
Claire Chang <tientzu@chromium.org>,
Robin Murphy <robin.murphy@arm.com>,
Christoph Hellwig <hch@lst.de>,
Guenter Roeck <linux@roeck-us.net>
Subject: [PATCH 4/5] swiotlb: Emit diagnostic in swiotlb_exit()
Date: Mon, 19 Jul 2021 13:30:53 +0100 [thread overview]
Message-ID: <20210719123054.6844-5-will@kernel.org> (raw)
In-Reply-To: <20210719123054.6844-1-will@kernel.org>
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 <tientzu@chromium.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20210705190352.GA19461@willie-the-truck
Suggested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Will Deacon <will@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
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WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will@kernel.org>
To: iommu@lists.linux-foundation.org
Cc: linux-kernel@vger.kernel.org, Will Deacon <will@kernel.org>,
Guenter Roeck <linux@roeck-us.net>,
Claire Chang <tientzu@chromium.org>,
Christoph Hellwig <hch@lst.de>,
Robin Murphy <robin.murphy@arm.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Nathan Chancellor <nathan@kernel.org>
Subject: [PATCH 4/5] swiotlb: Emit diagnostic in swiotlb_exit()
Date: Mon, 19 Jul 2021 13:30:53 +0100 [thread overview]
Message-ID: <20210719123054.6844-5-will@kernel.org> (raw)
In-Reply-To: <20210719123054.6844-1-will@kernel.org>
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 <tientzu@chromium.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20210705190352.GA19461@willie-the-truck
Suggested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Will Deacon <will@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
next prev parent reply other threads:[~2021-07-19 12:31 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-19 12:30 [PATCH 0/5] Fix restricted DMA vs swiotlb_exit() Will Deacon
2021-07-19 12:30 ` Will Deacon
2021-07-19 12:30 ` [PATCH 1/5] of: Return success from of_dma_set_restricted_buffer() when !OF_ADDRESS Will Deacon
2021-07-19 12:30 ` Will Deacon
2021-07-20 3:35 ` Claire Chang
2021-07-20 3:35 ` Claire Chang
2021-07-19 12:30 ` [PATCH 2/5] swiotlb: Point io_default_tlb_mem at static allocation Will Deacon
2021-07-19 12:30 ` Will Deacon
2021-07-20 3:35 ` Claire Chang
2021-07-20 3:35 ` Claire Chang
2021-07-20 7:51 ` Christoph Hellwig
2021-07-20 7:51 ` Christoph Hellwig
2021-07-20 8:49 ` Will Deacon
2021-07-20 8:49 ` Will Deacon
2021-07-19 12:30 ` [PATCH 3/5] swiotlb: Remove io_tlb_default_mem indirection Will Deacon
2021-07-19 12:30 ` Will Deacon
2021-07-20 3:35 ` Claire Chang
2021-07-20 3:35 ` Claire Chang
2021-07-19 12:30 ` Will Deacon [this message]
2021-07-19 12:30 ` [PATCH 4/5] swiotlb: Emit diagnostic in swiotlb_exit() Will Deacon
2021-07-20 3:36 ` Claire Chang
2021-07-20 3:36 ` Claire Chang
2021-07-19 12:30 ` [PATCH 5/5] swiotlb: Free tbl memory " Will Deacon
2021-07-19 12:30 ` Will Deacon
2021-07-20 3:36 ` Claire Chang
2021-07-20 3:36 ` Claire Chang
2021-07-20 8:35 ` Will Deacon
2021-07-20 8:35 ` Will Deacon
2021-07-20 7:51 ` [PATCH 0/5] Fix restricted DMA vs swiotlb_exit() Christoph Hellwig
2021-07-20 7:51 ` Christoph Hellwig
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