| Summary: | Newest 4.8.2-300.fc25.i686 (and also older i686) Fedora 25 kernels have architectural problems with INTEL PAE (32 to 36) HW extentions! | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | niemand <nobodyless> |
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> |
| Status: | CLOSED INSUFFICIENT_DATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | high | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 25 | CC: | extras-qa, gansalmon, ichavero, itamar, jonathan, kernel-maint, madhu.chinakonda, mchehab, nobodyless |
| Target Milestone: | --- | Flags: | jforbes:
needinfo?
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| Target Release: | --- | ||
| Hardware: | i686 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-04-28 17:18:19 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
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Description
niemand
2016-10-20 17:08:33 UTC
*********** MASS BUG UPDATE ************** We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 25 kernel bugs. Fedora 25 has now been rebased to 4.9.3-200.fc25. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel. If you have moved on to Fedora 26, and are still experiencing this issue, please change the version to Fedora 26. If you experience different issues, please open a new bug report for those. Let me continue with architectural woes we all have with x86 (IA32) extended 36 bit architecture (PAE). Here is what read says: "Architectures that manage their Memory Management Unit (MMU) differently are expected to emulate the three-level page tables. For example, on the x86 without PAE enabled, only two page table levels are available. The Page Middle Directory (PMD) is defined to be of size 1 and “folds back” directly onto the Page Global Directory (PGD) which is optimized out at compile time. Unfortunately, for architectures that do not manage their cache or Translation Lookaside Buffer (TLB) automatically, hooks for machine dependent have to be explicitly left in the code for when the TLB and CPU caches need to be altered and flushed even if they are null operations on some architectures like the x86." I would like to understand more about the statement: "Unfortunately, for architectures that do not manage their cache or TLB automatically, hooks for machine dependent have to be explicitly left in the code..."??? Do we have x86/IA32 INTEL/AMD specimens, which do NOT manage cache or TLB automatically? You, Fedora kernel maintainers, tell me, please?! Thank you, _nobody_ *********** MASS BUG UPDATE ************** We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 25 kernel bugs. Fedora 25 has now been rebased to 4.10.9-200.fc25. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel. If you have moved on to Fedora 26, and are still experiencing this issue, please change the version to Fedora 26. If you experience different issues, please open a new bug report for those. *********** MASS BUG UPDATE ************** This bug is being closed with INSUFFICIENT_DATA as there has not been a response in 2 weeks. If you are still experiencing this issue, please reopen and attach the relevant data from the latest kernel you are running and any data that might have been requested previously. |