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dm kcopyd: reserve fewer pages

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Reserve just the minimum of pages needed to process one job.

Because we allocate pages from page allocator, we don't need to reserve
a large number of pages.  The maximum job size is SUB_JOB_SIZE and we
calculate the number of reserved pages based on this.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Mikulas Patocka
2011-05-29 13:03:11 +01:00
committed by Alasdair G Kergon
parent bda8efec5c
commit 5f43ba2950
4 changed files with 6 additions and 13 deletions
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3
drivers/md/dm-raid1.c
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@@ -22,7 +22,6 @@
#define DM_MSG_PREFIX "raid1"
#define MAX_RECOVERY 1 /* Maximum number of regions recovered in parallel. */
#define DM_KCOPYD_PAGES 64
#define DM_RAID1_HANDLE_ERRORS 0x01
#define errors_handled(p) ((p)->features & DM_RAID1_HANDLE_ERRORS)
@@ -1116,7 +1115,7 @@ static int mirror_ctr(struct dm_target *ti, unsigned int argc, char **argv)
goto err_destroy_wq;
}
r = dm_kcopyd_client_create(DM_KCOPYD_PAGES, &ms->kcopyd_client);
r = dm_kcopyd_client_create(&ms->kcopyd_client);
if (r)
goto err_destroy_wq;