badblocks.c (main): Change the default number of blocks tested

at once from 16 to 64.  (Addresses Debian bug #232240)

misc/ChangeLog

@@ -1,3 +1,8 @@
+2004-02-28  Theodore Ts'o  <tytso@mit.edu>
+
+	* badblocks.c (main): Change the default number of blocks tested
+		at once from 16 to 64.  (Addresses Debian bug #232240)
+
 2004-02-26  Theodore Ts'o  <tytso@mit.edu>
 
 	* filefrag.c: Fix gcc -Wall nits.

misc/badblocks.8.in

@@ -78,20 +78,7 @@ programs.
 Specify the size of blocks in bytes.
 .TP
 .BI \-c " number of blocks"
-is the number of blocks which are tested at a time.  The default is 16.
-Increasing this number will increase the efficiency of
-.B badblocks
-but also will increase its memory usage.
-.B Badblocks
-needs memory proportional to the number of blocks tested at once, in
-read-only mode, proportional to twice that number in read-write mode,
-and proportional to three times that number in non-destructive read-write
-mode.  If you set the number-of-blocks parameter to too high a value,
-.B badblocks
-will exit almost immediately with an out-of-memory error "while allocating
-buffers".  If you set it too low, however, for a non-destructive-write-mode
-test, then it's possble for questionable blocks on an unreliable
-hard drive to be hidden by the effects of the hard disk track buffer.
+is the number of blocks which are tested at a time.  The default is 64.
 .TP
 .B \-f
 Normally, badblocks will refuse to do a read/write or a non-destructive

misc/badblocks.c

@@ -806,7 +806,7 @@ int main (int argc, char ** argv)
 	char * output_file = NULL;
 	FILE * in = NULL;
 	int block_size = 1024;
-	unsigned long blocks_at_once = 16;
+	unsigned long blocks_at_once = 64;
 	blk_t last_block, from_count;
 	int num_passes = 0;
 	int passes_clean = 0;