Commit 8ee2767a authored Apr 24, 2008 by Milan Broz Committed by Alasdair G Kergon Apr 25, 2008

dm snapshot: reduce default memory allocation



Limit the amount of memory allocated per snapshot on systems
with a large page size.  (The larger default chunk size on
these systems compensates for the smaller number of pages reserved.)

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

parent 92436262

drivers/md/dm-snap.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -36,9 +36,9 @@
		#define SNAPSHOT_COPY_PRIORITY 2

		/*
		* Each snapshot reserves this many pages for io
		* Reserve 1MB for each snapshot initially (with minimum of 1 page).
		*/
		#define SNAPSHOT_PAGES 256
		#define SNAPSHOT_PAGES (((1UL << 20) >> PAGE_SHIFT) ? : 1)

		static struct workqueue_struct *ksnapd;
		static void flush_queued_bios(struct work_struct *work);