From 531b1094b74365dcc55fa464d28a9a2497ae825d Mon Sep 17 00:00:00 2001 From: Latchesar Ionkov Date: Sun, 8 Jan 2006 01:05:00 -0800 Subject: [PATCH] v9fs: zero copy implementation Performance enhancement reducing the number of copies in the data and stat paths. Signed-off-by: Latchesar Ionkov Cc: Eric Van Hensbergen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/9p/debug.h | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) (limited to 'fs/9p/debug.h') diff --git a/fs/9p/debug.h b/fs/9p/debug.h index 4445f06919d9..fe551032788b 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) -- cgit v1.2.1