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authorLatchesar Ionkov <lucho@ionkov.net>2006-01-08 01:05:00 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 20:14:06 -0800
commit531b1094b74365dcc55fa464d28a9a2497ae825d (patch)
treea0384dabe3be1c844166d028b3ef7c21c3dfe5fc /fs/9p/debug.h
parentd8da097afb765654c866062148fd98b11db9003e (diff)
[PATCH] v9fs: zero copy implementation
Performance enhancement reducing the number of copies in the data and stat paths. Signed-off-by: Latchesar Ionkov <lucho@ionkov.net> Cc: Eric Van Hensbergen <ericvh@ericvh.myip.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/9p/debug.h')
-rw-r--r--fs/9p/debug.h23
1 files changed, 15 insertions, 8 deletions
diff --git a/fs/9p/debug.h b/fs/9p/debug.h
index 4445f06919d..fe551032788 100644
--- a/fs/9p/debug.h
+++ b/fs/9p/debug.h
@@ -51,16 +51,23 @@ do { \
#if DEBUG_DUMP_PKT
static inline void dump_data(const unsigned char *data, unsigned int datalen)
{
- int i, j;
- int len = datalen;
+ int i, n;
+ char buf[5*8];
- printk(KERN_DEBUG "data ");
- for (i = 0; i < len; i += 4) {
- for (j = 0; (j < 4) && (i + j < len); j++)
- printk(KERN_DEBUG "%02x", data[i + j]);
- printk(KERN_DEBUG " ");
+ n = 0;
+ i = 0;
+ while (i < datalen) {
+ n += snprintf(buf+n, sizeof(buf)-n, "%02x", data[i++]);
+ if (i%4 == 0)
+ n += snprintf(buf+n, sizeof(buf)-n, " ");
+
+ if (i%16 == 0) {
+ dprintk(DEBUG_ERROR, "%s\n", buf);
+ n = 0;
+ }
}
- printk(KERN_DEBUG "\n");
+
+ dprintk(DEBUG_ERROR, "%s\n", buf);
}
#else /* DEBUG_DUMP_PKT */
static inline void dump_data(const unsigned char *data, unsigned int datalen)