From 0672bb3c88f6393493cfd08b1176e09a892e5133 Mon Sep 17 00:00:00 2001
From: yangsheng <yangsheng>
Date: Fri, 30 May 2008 08:24:03 +0000
Subject: [PATCH] Branch b1_6 b=15594 i=adilger, shadow
The dd has a change of behaviour in 2.6.22 kernel. It might return
a partial read from read() system-call in some case.
---
lustre/tests/sanityN.sh | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/lustre/tests/sanityN.sh b/lustre/tests/sanityN.sh
index afd4e48e81..43310233da 100644
--- a/lustre/tests/sanityN.sh
+++ b/lustre/tests/sanityN.sh
@@ -201,17 +201,19 @@ test_10a() {
run_test 10a "write of file with sub-page size on multiple mounts "
test_10b() {
- yes "R" | dd of=$DIR1/f10b bs=3k count=1 || error "dd $DIR1"
+ # create a seed file
+ yes "R" | head -c 4000 >$TMP/f10b-seed
+ dd if=$TMP/f10b-seed of=$DIR1/f10b bs=3k count=1 || error "dd $DIR1"
truncate $DIR1/f10b 4096 || error "truncate 4096"
dd if=$DIR2/f10b of=$TMP/f10b-lustre bs=4k count=1 || error "dd $DIR2"
# create a test file locally to compare
- yes "R" | dd of=$TMP/f10b bs=3k count=1 || error "dd random"
+ dd if=$TMP/f10b-seed of=$TMP/f10b bs=3k count=1 || error "dd random"
truncate $TMP/f10b 4096 || error "truncate 4096"
cmp $TMP/f10b $TMP/f10b-lustre || error "file miscompare"
- rm $TMP/f10b $TMP/f10b-lustre
+ rm $TMP/f10b $TMP/f10b-lustre $TMP/f10b-seed
}
run_test 10b "write of file with sub-page size on multiple mounts "
--
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