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| author | Amit Shah <amit.shah@redhat.com> | 2009-03-19 18:22:28 +0530 |
|---|---|---|
| committer | Amit Shah <amit.shah@redhat.com> | 2009-03-19 18:22:28 +0530 |
| commit | 09517a9839f530a34971a236a3043c51c74ccf9f (patch) | |
| tree | ce461f108e63779415b3ac19aba4042b83af2997 | |
| parent | 7de1f286de85fd1e8359eee716536666a76fbb88 (diff) | |
| download | alloc-perf-09517a9839f530a34971a236a3043c51c74ccf9f.tar.gz alloc-perf-09517a9839f530a34971a236a3043c51c74ccf9f.tar.xz alloc-perf-09517a9839f530a34971a236a3043c51c74ccf9f.zip | |
Use ftruncate instead of lseek and write to create sparse file
Signed-off-by: Amit Shah <amit.shah@redhat.com>
| -rw-r--r-- | test-file-zero-alloc-speed.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/test-file-zero-alloc-speed.c b/test-file-zero-alloc-speed.c index 73a7975..8081c74 100644 --- a/test-file-zero-alloc-speed.c +++ b/test-file-zero-alloc-speed.c @@ -99,9 +99,9 @@ int do_mmap(char *name, off_t len) return -1; } /* memset has to have the mmap'ed file backed by something on - * disk -- bus error otherwise */ - lseek(fd, len - 1, SEEK_SET); - write(fd, "0", 1); + * disk -- bus error otherwise + */ + ftruncate(fd, len); addr = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); if (addr == MAP_FAILED) { |