diff options
| author | msmith <msmith@FreeBSD.org> | 2000-09-05 09:52:50 +0000 |
|---|---|---|
| committer | msmith <msmith@FreeBSD.org> | 2000-09-05 09:52:50 +0000 |
| commit | 6ff92c14b7a65f64dea4e0d4e8d19b2dcf3f57b3 (patch) | |
| tree | ded2222e22c2d532e900757ec03c1d5306a3e570 /lib/libstand/open.c | |
| parent | 75c63c707d89253e9bd44217d8975ec16bec5aa5 (diff) | |
| download | FreeBSD-src-6ff92c14b7a65f64dea4e0d4e8d19b2dcf3f57b3.zip FreeBSD-src-6ff92c14b7a65f64dea4e0d4e8d19b2dcf3f57b3.tar.gz | |
Implement readahead buffering for non-raw files. This drastically improves
the efficiency of byte-by-byte read operations on filesystems not already
supported by the block cache (especially NFS).
This should be a welcome change for users booting via PXE, as the loader
now reads its startup files almost instantly, instead of taking tens of
seconds.
Diffstat (limited to 'lib/libstand/open.c')
| -rw-r--r-- | lib/libstand/open.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/libstand/open.c b/lib/libstand/open.c index 3a9127c..471f937 100644 --- a/lib/libstand/open.c +++ b/lib/libstand/open.c @@ -1,3 +1,4 @@ +/* $FreeBSD$ */ /* $NetBSD: open.c,v 1.16 1997/01/28 09:41:03 pk Exp $ */ /*- @@ -79,6 +80,13 @@ o_gethandle(void) return(-1); } +static void +o_rainit(struct open_file *f) +{ + f->f_rabuf = malloc(SOPEN_RASIZE); + f->f_ralen = 0; + f->f_raoffset = 0; +} int open(const char *fname, int mode) @@ -118,6 +126,7 @@ open(const char *fname, int mode) if (error == 0) { f->f_ops = file_system[i]; + o_rainit(f); return (fd); } if (error != EINVAL) |
