------- Comment From heinz-werner_se...@de.ibm.com 2017-08-24 08:39 EDT------- IBM Bugzilla status: closed-> available with kernel 4.11 in artfiul
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1700959 Title: [17.10 FEAT] Architecture-conforming PGID generation Status in Ubuntu on IBM z Systems: Fix Released Status in linux package in Ubuntu: Fix Released Bug description: All non-Linux z Systems operating systems implement a "New" format for PGID generation: New Path Group Identifier Format (11 bytes) ------------------------------------------------------------------------- | xxyyzyyy| CSSID | LPAR id |CPU serial #|CPU model|TOD Clock | ------------------------------------------------------------------------- 1 2 3 4 6 8 11 where xx = 00 means old PGID format 10 means new PGID format 01 reserved for future use 11 reserved for future use z = 1 means PGID was created by the hipervisor (VM) Linux makes use of the same format, with the exception of the CSSID field. Linux stores the effective CSSID (always 0 for non-MCSS-E systems), whereas all other operating systems store the real CSSID. While this difference does not have an immediate functional effect, with mechanisms like Query Host Access to Volume support, PGIDs are now a user-visible data point and using the correct CSSID field helps in identifying hosts via their PGID in case of problems. This item is about changing the Linux PGID generation code to query the actual CSSID of a subchannel, and to use that CSSID in the generation of Linux-provided PGIDs. The real CSSID can be obtained e.g. using the Store Domain Config Attributes List CHSC. There may be other places where the real CSSID information associated with a CHPID/subchannel may be useful (e.g. SysFS, lscss). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1700959/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
