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authorZhi Yong Wu <wuzhy@linux.vnet.ibm.com>2011-11-08 13:00:14 +0800
committerKevin Wolf <kwolf@redhat.com>2011-12-05 14:51:35 +0100
commit98f90dba5ee56f699b28509a6cc7a9a8a57636eb (patch)
treec84af5d910421cad50039d1cb45756a0250e3e2b /block_int.h
parente9e6295b28b331762e67d466f77ba07a349edbbc (diff)
block: add I/O throttling algorithm
Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block_int.h')
-rw-r--r--block_int.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/block_int.h b/block_int.h
index 97b1c2be54..e2799e4f6b 100644
--- a/block_int.h
+++ b/block_int.h
@@ -39,6 +39,7 @@
#define BLOCK_IO_LIMIT_TOTAL 2
#define BLOCK_IO_SLICE_TIME 100000000
+#define NANOSECONDS_PER_SECOND 1000000000.0
#define BLOCK_OPT_SIZE "size"
#define BLOCK_OPT_ENCRYPT "encryption"