diff options
author | Andy Lutomirski <luto@kernel.org> | 2017-05-28 10:00:14 -0700 |
---|---|---|
committer | Ingo Molnar <mingo@kernel.org> | 2017-06-05 09:59:44 +0200 |
commit | ce4a4e565f5264909a18c733b864c3f74467f69e (patch) | |
tree | d795fc0ca4e922ca10a57c0ac835cd5f005892ee /arch/x86/include/asm/tlbbatch.h | |
parent | 3f79e4c7c9c2f5c30751ea5c8dd9fd1d56b81947 (diff) | |
download | linux-stable-ce4a4e565f5264909a18c733b864c3f74467f69e.tar.gz linux-stable-ce4a4e565f5264909a18c733b864c3f74467f69e.tar.bz2 linux-stable-ce4a4e565f5264909a18c733b864c3f74467f69e.zip |
x86/mm: Remove the UP asm/tlbflush.h code, always use the (formerly) SMP code
The UP asm/tlbflush.h generates somewhat nicer code than the SMP version.
Aside from that, it's fallen quite a bit behind the SMP code:
- flush_tlb_mm_range() didn't flush individual pages if the range
was small.
- The lazy TLB code was much weaker. This usually wouldn't matter,
but, if a kernel thread flushed its lazy "active_mm" more than
once (due to reclaim or similar), it wouldn't be unlazied and
would instead pointlessly flush repeatedly.
- Tracepoints were missing.
Aside from that, simply having the UP code around was a maintanence
burden, since it means that any change to the TLB flush code had to
make sure not to break it.
Simplify everything by deleting the UP code.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nadav Amit <nadav.amit@gmail.com>
Cc: Nadav Amit <namit@vmware.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/tlbbatch.h')
-rw-r--r-- | arch/x86/include/asm/tlbbatch.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/include/asm/tlbbatch.h b/arch/x86/include/asm/tlbbatch.h index 01a6de16fb96..f4a6ff352a0e 100644 --- a/arch/x86/include/asm/tlbbatch.h +++ b/arch/x86/include/asm/tlbbatch.h @@ -3,7 +3,6 @@ #include <linux/cpumask.h> -#ifdef CONFIG_SMP struct arch_tlbflush_unmap_batch { /* * Each bit set is a CPU that potentially has a TLB entry for one of @@ -11,6 +10,5 @@ struct arch_tlbflush_unmap_batch { */ struct cpumask cpumask; }; -#endif #endif /* _ARCH_X86_TLBBATCH_H */ |