On 04/14/2017 05:53 AM, Mikulas Patocka wrote:
On Thu, 13 Apr 2017, Eric Ren wrote:
Hi,
On 04/13/2017 07:28 PM, Mikulas Patocka wrote:
On Thu, 13 Apr 2017, Eric Ren wrote:
Hi Mikulas,
When inspecting on coredump with crash tool, I find that 'dm_table' cannot
be
resolved properly as follows:
===
crash> struct dm_table
struct dm_table {
int undefined__;
}
SIZE: 4
===
Looks this issue is introduced by 83d5e5b (dm: optimize use SRCU and RCU)
with
this code:
===
+/*
+ * A dummy definition to make RCU happy.
+ * struct dm_table should never be dereferenced in this file.
+ */ +struct dm_table {
+ int undefined__;
+};
+
===
It stops me from looking into dm_table when analyzing coredump. Is there
any
workaround?
or can be fixed somehow?
Regards,
Eric
So, move dm_table definition to drivers/md/dm.h
Thanks. So, are your going to fix this? Or should I test on your suggestion
and send a patch if it works?
Regards,
Eric
Mikulas
Hi
It turned out that the RCU macros changed and the dummy definition is no
longer needed. So, we can remove it.
Hi!
That's great, thanks!
Regards,
Eric
From: Mikulas Patocka <mpatocka@xxxxxxxxxx>
dm: remove dummy dm_table definition
This dummy structure definition was required for RCU macros, but it
doesn't seem to be required anymore, so delete it.
The dummy definition confuses the crash tool, see
https://www.redhat.com/archives/dm-devel/2017-April/msg00197.html
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
---
drivers/md/dm-ioctl.c | 8 --------
1 file changed, 8 deletions(-)
Index: linux-2.6/drivers/md/dm-ioctl.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-ioctl.c
+++ linux-2.6/drivers/md/dm-ioctl.c
@@ -37,14 +37,6 @@ struct hash_cell {
struct dm_table *new_map;
};
-/*
- * A dummy definition to make RCU happy.
- * struct dm_table should never be dereferenced in this file.
- */
-struct dm_table {
- int undefined__;
-};
-
struct vers_iter {
size_t param_size;
struct dm_target_versions *vers, *old_vers;
--
dm-devel mailing list
dm-devel@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/dm-devel
