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when zeroing the image, use fstatfs() to find the optimal block size 

(falling back to 8KB) instead of 512. should speed things up.
This commit is contained in:
lukem 2001-08-08 07:34:53 +00:00
parent b88a8597fb
commit 15af0b9ec7
1 changed files with 22 additions and 13 deletions
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35
sbin/newfs/newfs.c
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@ -1,4 +1,4 @@
/* $NetBSD: newfs.c,v 1.44 2001/07/30 07:45:08 lukem Exp $ */
/* $NetBSD: newfs.c,v 1.45 2001/08/08 07:34:53 lukem Exp $ */
/*
* Copyright (c) 1983, 1989, 1993, 1994
@ -43,7 +43,7 @@ __COPYRIGHT("@(#) Copyright (c) 1983, 1989, 1993, 1994\n\
#if 0
static char sccsid[] = "@(#)newfs.c 8.13 (Berkeley) 5/1/95";
#else
__RCSID("$NetBSD: newfs.c,v 1.44 2001/07/30 07:45:08 lukem Exp $");
__RCSID("$NetBSD: newfs.c,v 1.45 2001/08/08 07:34:53 lukem Exp $");
#endif
#endif /* not lint */
@ -416,20 +416,29 @@ main(int argc, char *argv[])
if (Zflag) { /* pre-zero the file */
char *buf;
int i;
int bufsize, i;
off_t bufrem;
struct statfs sfs;
if ((buf = calloc(1, sectorsize)) == NULL)
if (fstatfs(fso, &sfs) == -1) {
warn("can't fstatfs `%s'", special);
bufsize = 8192;
} else
bufsize = sfs.f_iosize;
if ((buf = calloc(1, bufsize)) == NULL)
err(1, "can't malloc buffer of %d",
sectorsize);
bufsize);
bufrem = fssize * sectorsize;
printf(
"Creating file system image in `%s', size %lld bytes.\n",
special, (long long)(fssize * sectorsize));
for (i = 0; i < fssize; i++) {
if (write(fso, buf, sectorsize) !=
sectorsize)
err(1,
"writing image sector %d",
i);
"Creating file system image in `%s', size %lld bytes, in %d byte chunks.\n",
special, (long long)bufrem, bufsize);
while (bufrem > 0) {
i = write(fso, buf,
MIN(bufsize, bufrem));
if (i == -1)
err(1, "writing image");
bufrem -= i;
}
}