x86 switch_mm uninlining and IRQ improvements
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- v2 Latest5 patches 3 repliesIn review
Patches in v2 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/5 | arm: Include linux/preempt.h from asm/mmu_context.harch/ | +1 | 2 replies | |
| 2/5 | sched: Add switch_mm_irqs_off and use it in the schedulerinclude/ kernel/ | +10 | 0 replies | |
| 3/5 | x86/mm: Build arch/x86/mm/tlb.c even on !SMParch/ arch/ | +5 | 0 replies | |
| 4/5 | x86/mm: Uninline switch_mmarch/ arch/ | +104 | 0 replies | |
| 5/5 | x86/mm: Turn off IRQs in switch_mmarch/ arch/ | +13 | 0 replies |
Reviews trailers per patch
1 of 5 patches has a Reviewed-by or Acked-by of their own; the series has one for all of them.
| Patch | Borislav Petkov | Russell King |
|---|---|---|
| Series | R-b | |
| 1/5 | A-b | |
| 2/5 | ||
| 3/5 | ||
| 4/5 | ||
| 5/5 |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH v2 0/5] x86 switch_mm uninlining and IRQ improvements
Hi all-
I've been playing with context switching lately, and I'm going to start sending out some of the patches that should be mostly self-contained and ready for -tip.
Here's a little batch to start improving switch_mm. It uninlines it and makes it run with IRQs off. (AFAICT everyone who's modified it thought it ran with IRQs off, but that's not always the case. I don't know of any bugs that this fixes, but it'll be needed for PCID to avoid introducing really nasty races.)
This may also help a bit with FSGSBASE -- not sure yet. It certainly won't hurt.
It contains a trivial off-topic ARM patch to avoid breaking the build.
Andy Lutomirski (5):
arm: Include linux/preempt.h from asm/mmu_context.h
sched: Add switch_mm_irqs_off and use it in the scheduler x86/mm: Build arch/x86/mm/tlb.c even on !SMP x86/mm: Uninline switch_mm
x86/mm: Turn off IRQs in switch_mm
arch/arm/include/asm/mmu_context.h | 1 + arch/x86/include/asm/mmu_context.h | 101 ++------------------------------ arch/x86/mm/Makefile | 3 +- arch/x86/mm/tlb.c | 116 +++++++++++++++++++++++++++++++++++++ include/linux/mmu_context.h | 7 +++ kernel/sched/core.c | 6 +- 6 files changed, 133 insertions(+), 101 deletions(-)
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