[patch] very ugly hack to fix 100% CPU problem

veryuglyhack.patch (text/plain), 3.14 KB, created by Andreas Klauer on 2005-09-30 07:11:35 UTC

--- convertfs/devremap.c	2002-03-01 16:16:45.000000000 +0100
+++ convertfs2005/devremap.c	2005-09-30 15:57:24.000000000 +0200
@@ -19,6 +19,7 @@
 #include <string.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <time.h>
 
 #include "convertfs.h"
 
@@ -80,6 +81,15 @@
 static struct superblock super;
 static struct info	 info;
 
+
+/* ULTRA UGLY HACK */
+struct indexpage *hack_ip;
+struct chunk     *hack_chunk = NULL;
+baddr_t          *hack_physp;
+baddr_t          hack_virt;
+int              hack_i;
+
+
 static void
 die (const char *format, ...)
 {
@@ -346,17 +356,63 @@
 	baddr_t		 virt;
 	int		 i;
 
+/*        printf("find_cross_block\n"); */
+
+        if(hack_chunk != NULL)
+        {
+            if ((*hack_physp == bm->to) && (*hack_physp != hack_virt))
+            {
+
+                ip = hack_ip;
+                chunk = hack_chunk;
+                physp = hack_physp;
+                virt = hack_virt;
+                i = hack_i;
+
+                goto VERY_UGLY_HACK;
+            }
+        }
+
 	i = bm->i + 1;
 	chunk = bm->chunk;
 	for (ip = bm->ip; ip; ip = ip->next, chunk = ip->chunk)
 		for (; chunk; chunk = next_chunk(ip, chunk), i = 0) {
+
+/*  printf("chunk: %p  bm->to: %lx\n", chunk, (long int)bm->to); */
+
 			virt = chunk->offset + i;
 			physp = &chunk->block[i];
-			for (; i < chunk->nblocks; i++, virt++, physp++)
+			for (; i < chunk->nblocks; i++, virt++, physp++) {
+                                VERY_UGLY_HACK:
+ 
 				if ((*physp == bm->to) && (*physp != virt)) {
+
+                                        hack_ip = ip;
+                                        hack_chunk = chunk;
+                                        hack_physp = physp;
+                                        hack_virt = virt;
+                                        hack_i = i;
+
+                                        hack_i++;
+                                        hack_virt++;
+                                        hack_physp++;
+
+                                        if(hack_i >= chunk->nblocks)
+                                        {
+                                            hack_chunk = next_chunk(hack_ip, hack_chunk);
+                                            hack_i = 0;
+
+                                            if(hack_chunk)
+                                            {
+                                                hack_virt = hack_chunk->offset + hack_i;
+                                                hack_physp = &hack_chunk->block[hack_i];
+                                            }
+                                        }
+
 					handle_cross_block(ip, bm, physp, virt);
 					return 1;
 				}
+                       }
 		}
 	return 0;
 }
@@ -606,6 +662,8 @@
 int
 main (int argc, char *argv[])
 {
+        time_t t;
+
 	selfname = argv[0];
 	if (argc != 2) {
 		fprintf(stderr, "Usage: %s DEVICE\n", selfname);
@@ -621,9 +679,13 @@
 	replay_log();
 	load_index();
 	while (info.ip) {
+                t = time(NULL);
+
 		prepare_log();
 		write_log();
 		commit_log();
+
+                printf("...that took %d seconds.\n", (int)(time(NULL)-t));
 	}
 	printf("And now the block0...\n");
 	bmove(super.block0, 0);