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| author | Peter Zijlstra <peterz@infradead.org> | 2018-09-19 13:24:41 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-04-03 10:32:47 +0200 |
| commit | 96bc9567cbe112e9320250f01b9c060c882e8619 (patch) | |
| tree | 7948ca705fc25538b784b4f28dd62a2c5ec88b97 /include/asm-generic/tlb.h | |
| parent | 8b6dd0c47894e2c190560914318aa4181bc8c2f2 (diff) | |
| download | lwn-96bc9567cbe112e9320250f01b9c060c882e8619.tar.gz lwn-96bc9567cbe112e9320250f01b9c060c882e8619.zip | |
asm-generic/tlb, arch: Invert CONFIG_HAVE_RCU_TABLE_INVALIDATE
Make issuing a TLB invalidate for page-table pages the normal case.
The reason is twofold:
- too many invalidates is safer than too few,
- most architectures use the linux page-tables natively
and would thus require this.
Make it an opt-out, instead of an opt-in.
No change in behavior intended.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/asm-generic/tlb.h')
| -rw-r--r-- | include/asm-generic/tlb.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h index 1c861989b704..81799e6a4304 100644 --- a/include/asm-generic/tlb.h +++ b/include/asm-generic/tlb.h @@ -135,11 +135,12 @@ * When used, an architecture is expected to provide __tlb_remove_table() * which does the actual freeing of these pages. * - * HAVE_RCU_TABLE_INVALIDATE + * HAVE_RCU_TABLE_NO_INVALIDATE * - * This makes HAVE_RCU_TABLE_FREE call tlb_flush_mmu_tlbonly() before freeing - * the page-table pages. Required if you use HAVE_RCU_TABLE_FREE and your - * architecture uses the Linux page-tables natively. + * This makes HAVE_RCU_TABLE_FREE avoid calling tlb_flush_mmu_tlbonly() before + * freeing the page-table pages. This can be avoided if you use + * HAVE_RCU_TABLE_FREE and your architecture does _NOT_ use the Linux + * page-tables natively. * * MMU_GATHER_NO_RANGE * |