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[2/3] btrfs-progs: don't create no-used threads in btrfs-image

Message ID 3e745f7d9a9545e81283d28671c8ac23cdf28685.1441805445.git.zhaolei@cn.fujitsu.com (mailing list archive)
State Accepted
Headers show

Commit Message

Zhaolei Sept. 9, 2015, 1:32 p.m. UTC
In case of creating image without compess, we don't need to create
many no-used compress threads.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
---
 btrfs-image.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)
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Patch

diff --git a/btrfs-image.c b/btrfs-image.c
index 7f49cce..c7681f4 100644
--- a/btrfs-image.c
+++ b/btrfs-image.c
@@ -2786,11 +2786,14 @@  int main(int argc, char *argv[])
 		}
 	}
 
-	if ((compress_level > 0 || create == 0) &&
-	    num_threads == 0) {
-		num_threads = sysconf(_SC_NPROCESSORS_ONLN);
-		if (num_threads <= 0)
-			num_threads = 1;
+	if (compress_level > 0 || create == 0) {
+		if (num_threads == 0) {
+			num_threads = sysconf(_SC_NPROCESSORS_ONLN);
+			if (num_threads <= 0)
+				num_threads = 1;
+		}
+	} else {
+		num_threads = 0;
 	}
 
 	if (create) {