This is a note to let you know that I've just added the patch titled
dm integrity: reduce vmalloc space footprint on 32-bit architectures
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dm-integrity-reduce-vmalloc-space-footprint-on-32-bi.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
commit 5e5bd105aa2363efe0ed79f8f83777b8912cc4f8
Author: Mikulas Patocka <[email protected]>
Date: Mon Jun 26 16:44:34 2023 +0200
dm integrity: reduce vmalloc space footprint on 32-bit architectures
[ Upstream commit 6d50eb4725934fd22f5eeccb401000687c790fd0 ]
It was reported that dm-integrity runs out of vmalloc space on 32-bit
architectures. On x86, there is only 128MiB vmalloc space and dm-integrity
consumes it quickly because it has a 64MiB journal and 8MiB recalculate
buffer.
Fix this by reducing the size of the journal to 4MiB and the size of
the recalculate buffer to 1MiB, so that multiple dm-integrity devices
can be created and activated on 32-bit architectures.
Cc: [email protected]
Signed-off-by: Mikulas Patocka <[email protected]>
Signed-off-by: Mike Snitzer <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 12b086b14cc4a..81157801a3dc6 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -31,11 +31,11 @@
#define DEFAULT_BUFFER_SECTORS 128
#define DEFAULT_JOURNAL_WATERMARK 50
#define DEFAULT_SYNC_MSEC 10000
-#define DEFAULT_MAX_JOURNAL_SECTORS 131072
+#define DEFAULT_MAX_JOURNAL_SECTORS (IS_ENABLED(CONFIG_64BIT) ? 131072 :
8192)
#define MIN_LOG2_INTERLEAVE_SECTORS 3
#define MAX_LOG2_INTERLEAVE_SECTORS 31
#define METADATA_WORKQUEUE_MAX_ACTIVE 16
-#define RECALC_SECTORS 32768
+#define RECALC_SECTORS (IS_ENABLED(CONFIG_64BIT) ? 32768 :
2048)
#define RECALC_WRITE_SUPER 16
#define BITMAP_BLOCK_SIZE 4096 /* don't change it */
#define BITMAP_FLUSH_INTERVAL (10 * HZ)
--
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