ba6f508d0ec4 x86/mm: Drop usage of __flush_tlb_all() in
kernel_physical_mapping_init()
** No longer affects: linux
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Changed in: intel
Status: New => Fix Released
** Changed in: linux (Ubuntu)
Status: New => Fix Released
** Description changed:
Description:
A new warning introduced in v4.20-rc1 is triggered by the pmem use case for
memory hotplug:
WARNING: CPU: 3 PID: 998 at arch/x86/include/asm/tlbflush.h:460
__flush_tlb_all+0x1b/0x3a
The fix is to drop those __flush_tlb_all calls, but requests to
strengthen the safety of kernel_physical_mapping_init to give confidence
that it is safe to remove those calls is thus far leading to boot hangs.
Commits in next:(should be in 5.1, after merged, commit id will be changed)
ba6f508d0ec4 x86/mm: Drop usage of __flush_tlb_all() in
kernel_physical_mapping_init()
0a9fe8ca844d x86/mm: Validate kernel_physical_mapping_init() PTE population
4369deaa2f02 generic/pgtable: Introduce set_pte_safe()
0cebbb60f759 generic/pgtable: Introduce {p4d,pgd} _same()
c683c37cd132 generic/pgtable: Make {pmd, pud} _same() unconditionally
available
ba6f508d0ec4 x86/mm: Drop usage of __flush_tlb_all() in
kernel_physical_mapping_init()
- Targeted Release: 19.10
- Targeted Kernel: 5.1
+ Targeted Release: 19.04
+ Targeted Kernel: 5.0
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https://bugs.launchpad.net/bugs/1823588
Title:
[bug]kernel_physical_mapping_init regression in v4.20-rc1
Status in intel:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Bug description:
Description:
A new warning introduced in v4.20-rc1 is triggered by the pmem use case for
memory hotplug:
WARNING: CPU: 3 PID: 998 at arch/x86/include/asm/tlbflush.h:460
__flush_tlb_all+0x1b/0x3a
The fix is to drop those __flush_tlb_all calls, but requests to
strengthen the safety of kernel_physical_mapping_init to give
confidence that it is safe to remove those calls is thus far leading
to boot hangs.
Commits in next:(should be in 5.1, after merged, commit id will be changed)
ba6f508d0ec4 x86/mm: Drop usage of __flush_tlb_all() in
kernel_physical_mapping_init()
0a9fe8ca844d x86/mm: Validate kernel_physical_mapping_init() PTE population
4369deaa2f02 generic/pgtable: Introduce set_pte_safe()
0cebbb60f759 generic/pgtable: Introduce {p4d,pgd} _same()
c683c37cd132 generic/pgtable: Make {pmd, pud} _same() unconditionally
available
ba6f508d0ec4 x86/mm: Drop usage of __flush_tlb_all() in
kernel_physical_mapping_init()
Targeted Release: 19.04
Targeted Kernel: 5.0
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