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dm snapshot: reduce default memory allocation

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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>
This commit is contained in:
Milan Broz 2008-04-24 21:42:36 +01:00 committed by Alasdair G Kergon
parent 924362629b
commit 8ee2767a59
1 changed files with 2 additions and 2 deletions
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4
drivers/md/dm-snap.c
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@ -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);