arch, mm: Remove tlb_fast_mode()

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Since the introduction of preemptible mmu_gather TLB fast mode has been
broken. TLB fast mode relies on there being absolutely no concurrency;
it frees pages first and invalidates TLBs later.

However now we can get concurrency and stuff goes *bang*.

This patch removes all tlb_fast_mode() code; it was found the better
option vs trying to patch the hole by entangling tlb invalidation with
the scheduler.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Tony Luck <tony.luck@intel.com>
Reported-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

...

This commit is contained in:

Peter Zijlstra 2013-06-05 12:26:50 +02:00 • committed by Linus Torvalds

parent 2c95523c0f

commit 29eb77825c

4 changed files with 13 additions and 81 deletions

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27

arch/arm/include/asm/tlb.h

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41

arch/ia64/include/asm/tlb.h

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17

include/asm-generic/tlb.h

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9

mm/memory.c

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