In the message dated: Tue, 29 Nov 2016 20:56:25 +0000, The pithy ruminations from Luis Bolinches on <Re: [gpfsug-discuss] Upgrading kernel on RHEL> were: => Its been around in certain cases, some kernel <-> storage combination get => hit some not => => Scott referenced it here https://www.ibm.com/developerworks/community/wikis => /home?lang=en#!/wiki/General+Parallel+File+System+%28GPFS%29/page/ => Storage+with+GPFS+on+Linux => => https://access.redhat.com/solutions/2437991 => => It happens also on 7.2 and 7.3 ppc64 (not yet on the list of "supported") => it does not on 7.1. I can confirm this at least for XIV storage, that it => can go up to 1024 only. => => I know the FAQ will get updated about this, at least there is a CMVC that => states so. => => Long short, you create a FS, and you see all your paths die and recover and => die and receover and ..., one after another. And it never really gets done. => Also if you boot from SAN ... well you can figure it out ;)
Wow, that sounds extremely similar to a kernel bug/incompatibility with GPFS that I reported in May: https://patchwork.kernel.org/patch/9140337/ https://bugs.centos.org/view.php?id=10997 My conclusion is not to apply kernel updates, unless strictly necessary (Dirty COW, anyone) or tested & validated with GPFS. Mark => => => -- => Ystävällisin terveisin / Kind regards / Saludos cordiales / Salutations => => Luis Bolinches => Lab Services => http://www-03.ibm.com/systems/services/labservices/ => => IBM Laajalahdentie 23 (main Entrance) Helsinki, 00330 Finland => Phone: +358 503112585 => => "If you continually give you will continually have." Anonymous => => => => ----- Original message ----- => From: Nathan Harper <nathan.har...@cfms.org.uk> > Sent by: gpfsug-discuss-boun...@spectrumscale.org => To: gpfsug main discussion list <gpfsug-discuss@spectrumscale.org> => Cc: => Subject: Re: [gpfsug-discuss] Upgrading kernel on RHEL => Date: Tue, Nov 29, 2016 10:44 PM => => This is the first I've heard of this max_sectors_kb issue, has it => already been discussed on the list? Can you point me to any more info? => => => => On 29 Nov 2016, at 19:08, Luis Bolinches <luis.bolinc...@fi.ibm.com> => wrote: => => => Seen that one on 6.8 too => => teh 4096 does NOT work if storage is XIV then is 1024 => => => -- => Ystävällisin terveisin / Kind regards / Saludos cordiales / => Salutations => => Luis Bolinches => Lab Services => http://www-03.ibm.com/systems/services/labservices/ => => IBM Laajalahdentie 23 (main Entrance) Helsinki, 00330 Finland => Phone: +358 503112585 => => "If you continually give you will continually have." Anonymous => => => => ----- Original message ----- => From: "Kevin D Johnson" <kevin...@us.ibm.com> => Sent by: gpfsug-discuss-boun...@spectrumscale.org => To: gpfsug-discuss@spectrumscale.org => Cc: gpfsug-discuss@spectrumscale.org => Subject: Re: [gpfsug-discuss] Upgrading kernel on RHEL => Date: Tue, Nov 29, 2016 8:48 PM => => I have run into the max_sectors_kb issue and creating a file => system when moving beyond 3.10.0-327 on RH 7.2 as well. You => either have to reinstall the OS or walk the kernel back to 327 => via: => => https://access.redhat.com/solutions/186763 => => Kevin D. Johnson, MBA, MAFM => Spectrum Computing, Senior Managing Consultant => => IBM Certified Deployment Professional - Spectrum Scale V4.1.1 => IBM Certified Deployment Professional - Cloud Object Storage => V3.8 => IBM Certified Solution Advisor - Spectrum Computing V1 => => 720.349.6199 - kevin...@us.ibm.com => => => => => ----- Original message ----- => From: "Luis Bolinches" <luis.bolinc...@fi.ibm.com> => Sent by: gpfsug-discuss-boun...@spectrumscale.org => To: gpfsug-discuss@spectrumscale.org => Cc: gpfsug-discuss@spectrumscale.org => Subject: Re: [gpfsug-discuss] Upgrading kernel on RHEL => Date: Tue, Nov 29, 2016 5:20 AM => => My 2 cents => => And I am sure different people have different opinions. => => New kernels might be problematic. => => Now got my fun with RHEL 7.3 kernel and max_sectors_kb for => new FS. Is something will come to the FAQ soon. It is => already on draft not public. => => I guess whatever you do .... get a TEST cluster and do it => there first, that is better the best advice I could give. => => => -- => Ystävällisin terveisin / Kind regards / Saludos cordiales / => Salutations => => Luis Bolinches => Lab Services => http://www-03.ibm.com/systems/services/labservices/ => => IBM Laajalahdentie 23 (main Entrance) Helsinki, 00330 => Finland => Phone: +358 503112585 => => "If you continually give you will continually have." => Anonymous => => => => ----- Original message ----- => From: "Sobey, Richard A" <r.so...@imperial.ac.uk> => Sent by: gpfsug-discuss-boun...@spectrumscale.org => To: "'gpfsug-discuss@spectrumscale.org'" < => gpfsug-discuss@spectrumscale.org> => Cc: => Subject: [gpfsug-discuss] Upgrading kernel on RHEL => Date: Tue, Nov 29, 2016 11:59 AM => => => All, => => => => As a general rule, when updating GPFS to a newer => release, would you perform a full OS update at the same => time, and/or update the kernel too? => => => => Just trying to gauge what other people do in this => respect. Personally I’ve always upgraded everything at => once – including kernel. Am I looking for trouble? => => => => Cheers => => Richard => => _______________________________________________ => gpfsug-discuss mailing list => gpfsug-discuss at spectrumscale.org => http://gpfsug.org/mailman/listinfo/gpfsug-discuss => => => => Ellei edellä ole toisin mainittu: / Unless stated otherwise => above: => Oy IBM Finland Ab => PL 265, 00101 Helsinki, Finland => Business ID, Y-tunnus: 0195876-3 => Registered in Finland => => _______________________________________________ => gpfsug-discuss mailing list => gpfsug-discuss at spectrumscale.org => http://gpfsug.org/mailman/listinfo/gpfsug-discuss => => => => _______________________________________________ => gpfsug-discuss mailing list => gpfsug-discuss at spectrumscale.org => http://gpfsug.org/mailman/listinfo/gpfsug-discuss => => => => Ellei edellä ole toisin mainittu: / Unless stated otherwise above: => Oy IBM Finland Ab => PL 265, 00101 Helsinki, Finland => Business ID, Y-tunnus: 0195876-3 => Registered in Finland => => => _______________________________________________ => gpfsug-discuss mailing list => gpfsug-discuss at spectrumscale.org => http://gpfsug.org/mailman/listinfo/gpfsug-discuss => => _______________________________________________ => gpfsug-discuss mailing list => gpfsug-discuss at spectrumscale.org => http://gpfsug.org/mailman/listinfo/gpfsug-discuss => => => => Ellei edellä ole toisin mainittu: / Unless stated otherwise above: => Oy IBM Finland Ab => PL 265, 00101 Helsinki, Finland => Business ID, Y-tunnus: 0195876-3 => Registered in Finland => => _______________________________________________ => gpfsug-discuss mailing list => gpfsug-discuss at spectrumscale.org => http://gpfsug.org/mailman/listinfo/gpfsug-discuss => _______________________________________________ gpfsug-discuss mailing list gpfsug-discuss at spectrumscale.org http://gpfsug.org/mailman/listinfo/gpfsug-discuss