Just a little whitespace cleanup patch for Documentation/BUG-HUNTING
Signed-off-by: Clemens Koller <clemens.koller@anagramm.de>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
[Sat Mar 2 10:32:33 PST 1996 KERNEL_BUG-HOWTO lm@sgi.com (Larry McVoy)]
[Sat Mar 2 10:32:33 PST 1996 KERNEL_BUG-HOWTO lm@sgi.com (Larry McVoy)]
-This is how to track down a bug if you know nothing about kernel hacking.
+This is how to track down a bug if you know nothing about kernel hacking.
It's a brute force approach but it works pretty well.
You need:
It's a brute force approach but it works pretty well.
You need:
. Rebuild a revision that you believe works, install, and verify that.
. Do a binary search over the kernels to figure out which one
. Rebuild a revision that you believe works, install, and verify that.
. Do a binary search over the kernels to figure out which one
- introduced the bug. I.e., suppose 1.3.28 didn't have the bug, but
+ introduced the bug. I.e., suppose 1.3.28 didn't have the bug, but
you know that 1.3.69 does. Pick a kernel in the middle and build
that, like 1.3.50. Build & test; if it works, pick the mid point
between .50 and .69, else the mid point between .28 and .50.
. You'll narrow it down to the kernel that introduced the bug. You
you know that 1.3.69 does. Pick a kernel in the middle and build
that, like 1.3.50. Build & test; if it works, pick the mid point
between .50 and .69, else the mid point between .28 and .50.
. You'll narrow it down to the kernel that introduced the bug. You
- can probably do better than this but it gets tricky.
+ can probably do better than this but it gets tricky.
. Narrow it down to a subdirectory
. Narrow it down to a subdirectory
directories:
Copy the non-working directory next to the working directory
directories:
Copy the non-working directory next to the working directory
One directory at time, try moving the working directory to
One directory at time, try moving the working directory to
- "dir.62" and mv dir.63 dir"time, try
+ "dir.62" and mv dir.63 dir"time, try
mv dir dir.62
mv dir.63 dir
find dir -name '*.[oa]' -print | xargs rm -f
And then rebuild and retest. Assuming that all related
mv dir dir.62
mv dir.63 dir
find dir -name '*.[oa]' -print | xargs rm -f
And then rebuild and retest. Assuming that all related
- changes were contained in the sub directory, this should
- isolate the change to a directory.
+ changes were contained in the sub directory, this should
+ isolate the change to a directory.
Problems: changes in header files may have occurred; I've
Problems: changes in header files may have occurred; I've
- found in my case that they were self explanatory - you may
+ found in my case that they were self explanatory - you may
or may not want to give up when that happens.
. Narrow it down to a file
- You can apply the same technique to each file in the directory,
or may not want to give up when that happens.
. Narrow it down to a file
- You can apply the same technique to each file in the directory,
- hoping that the changes in that file are self contained.
-
+ hoping that the changes in that file are self contained.
+
. Narrow it down to a routine
- You can take the old file and the new file and manually create
. Narrow it down to a routine
- You can take the old file and the new file and manually create
that makes the difference.
Finally, you take all the info that you have, kernel revisions, bug
that makes the difference.
Finally, you take all the info that you have, kernel revisions, bug
-description, the extent to which you have narrowed it down, and pass
+description, the extent to which you have narrowed it down, and pass
that off to whomever you believe is the maintainer of that section.
A post to linux.dev.kernel isn't such a bad idea if you've done some
work to narrow it down.
that off to whomever you believe is the maintainer of that section.
A post to linux.dev.kernel isn't such a bad idea if you've done some
work to narrow it down.
git.openpandora.org / pandora-kernel.git / commitdiff