# SLES12SP4 and upper version

**URL:** <https://forums.suse.com/t/sles12sp4-and-upper-version/35310>\
**Category:** SUSE Linux Enterprise Server\
**Created:** [October 6, 2020, 5:44pm UTC](https://forums.suse.com/t/sles12sp4-and-upper-version/35310 "2020-10-06T17:44:11Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Tao](https://avatars.discourse-cdn.com/v4/letter/t/f9ae1b/32.png) [@Tao](https://forums.suse.com/u/Tao)\
**Post date:** [October 6, 2020, 5:44pm UTC](https://forums.suse.com/t/sles12sp4-and-upper-version/35310/1 "2020-10-06T17:44:11Z")

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We recently encountered a SLES12SP4, or SLES15SP1 system crash (soft lockup…) when running our applications. After some trial and error, we found that we have to disable numa\_balancing in kernel settings to resolve the problem. NUMA balancing is good feature in OS that is to boost the normal application performance by ~20%, however, due to the “bug”, we can not enable it.  
Does anybody have the same problem? I am wondering if it is a SLES OS bug that SUSE has already known and has a fix on it.

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**Author:** ![malcolmlewis](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/malcolmlewis/32/11375_2.png) [@malcolmlewis](https://forums.suse.com/u/malcolmlewis)\
**Post date:** [October 6, 2020, 9:27pm UTC](https://forums.suse.com/t/sles12sp4-and-upper-version/35310/2 "2020-10-06T21:27:12Z")

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Hi and welcome to the forum 🙂  
Are you running btrfs? If so can you try the following boot option: `cgroup_disable=memory`

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**Author:** ![Tao](https://avatars.discourse-cdn.com/v4/letter/t/f9ae1b/32.png) [@Tao](https://forums.suse.com/u/Tao)\
**Post date:** [October 10, 2020, 1:37am UTC](https://forums.suse.com/t/sles12sp4-and-upper-version/35310/3 "2020-10-10T01:37:33Z")

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Thanks for the suggestion, I believe we have btrfs running. I have not made the boot option test yet, but even if the setting is working to make the system sustainable, I still need to understand what’s the problem that actually caused the system crash. Is there a known bug in btrfs or in the NUMA balancing implementation, or a combination of these or others?

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**Author:** ![malcolmlewis](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/malcolmlewis/32/11375_2.png) [@malcolmlewis](https://forums.suse.com/u/malcolmlewis)\
**Post date:** [October 10, 2020, 1:52am UTC](https://forums.suse.com/t/sles12sp4-and-upper-version/35310/4 "2020-10-10T01:52:31Z")

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Hi  
Are you in a position to open a Support Request about this?

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**Author:** ![Tao](https://avatars.discourse-cdn.com/v4/letter/t/f9ae1b/32.png) [@Tao](https://forums.suse.com/u/Tao)\
**Post date:** [October 12, 2020, 5:18am UTC](https://forums.suse.com/t/sles12sp4-and-upper-version/35310/5 "2020-10-12T05:18:17Z")

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yes, if I can not find resolution from the forum, I may submit a support request. Thanks.

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**Author:** ![malcolmlewis](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/malcolmlewis/32/11375_2.png) [@malcolmlewis](https://forums.suse.com/u/malcolmlewis)\
**Post date:** [October 12, 2020, 12:40pm UTC](https://forums.suse.com/t/sles12sp4-and-upper-version/35310/6 "2020-10-12T12:40:00Z")

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Hi  
A Support Request might be your best course of action, I suspect you need to work with the engineers and test potential fixes.