maria-discuss team mailing list archive

[Marko Mäkelä <marko.makela@xxxxxxxxxxx>]

On Tuesday, September 25, 2018 at 11:48 Kenneth Penza (kpenza@xxxxxxxxx) wrote:
> Startup messages:
>
> Sep 25 10:40:53 srv1 mysqld: 2018-09-25 10:40:52 0 [Note] InnoDB: Opened 8 undo tablespaces
> Sep 25 10:40:53 srv1 mysqld: 2018-09-25 10:40:53 0 [Warning] InnoDB: Failed to set memory to DODUMP: Invalid argument ptr 0x2aaac5400000 size 2097152
> Sep 25 10:40:53 srv1 mysqld: 2018-09-25 10:40:53 0 [Note] InnoDB: 128 out of 128 rollback segments in 8 undo tablespaces are active.
>
> Shutdown messages:
>
> Sep 25 10:41:18 srv1 mysqld: 2018-09-25 10:41:18 0 [Note] InnoDB: Buffer pool(s) dump completed at 180925 10:41:18
> Sep 25 10:41:19 srv1 mysqld: 2018-09-25 10:41:19 0 [Warning] InnoDB: Failed to set memory to DODUMP: Invalid argument ptr 0x2aaac3400000 size 33554432
> Sep 25 10:41:19 srv1 mysqld: 2018-09-25 10:41:19 0 [Note] InnoDB: Shutdown completed; log sequence number 1522725; transaction id 22
>
> Do you have ideas on what is causing "InnoDB: Failed to set memory to DODUMP: Invalid argument ptr .. " warning?

Thanks to your report, Daniel Black (the author of a contribution that
excludes large InnoDB buffers from core dumps) found out that it is a
bug in the Linux kernel. His fix will be in the 4.19 kernel, and it
was also included in a backport queue for the maintenance updates of
older kernels:

https://lwn.net/Articles/767784/
https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/commit/?id=c386d043e8e7718b218731b2868453335245ceeb

For future reference, I have updated
https://jira.mariadb.org/browse/MDEV-10814 with this information.
-- 
Marko Mäkelä, Lead Developer InnoDB
MariaDB Corporation