linux/arch/sh/include
Linus Torvalds 1cf35d4771 mm: split 'tlb_flush_mmu()' into tlb flushing and memory freeing parts
The mmu-gather operation 'tlb_flush_mmu()' has done two things: the
actual tlb flush operation, and the batched freeing of the pages that
the TLB entries pointed at.

This splits the operation into separate phases, so that the forced
batched flushing done by zap_pte_range() can now do the actual TLB flush
while still holding the page table lock, but delay the batched freeing
of all the pages to after the lock has been dropped.

This in turn allows us to avoid a race condition between
set_page_dirty() (as called by zap_pte_range() when it finds a dirty
shared memory pte) and page_mkclean(): because we now flush all the
dirty page data from the TLB's while holding the pte lock,
page_mkclean() will be held up walking the (recently cleaned) page
tables until after the TLB entries have been flushed from all CPU's.

Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: Dave Hansen <dave.hansen@intel.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-25 16:05:40 -07:00
..
asm mm: split 'tlb_flush_mmu()' into tlb flushing and memory freeing parts 2014-04-25 16:05:40 -07:00
cpu-common/cpu sh: Remove unused sh_pfc_register_info() function 2013-01-25 09:24:30 +09:00
cpu-sh2/cpu sh: prefix sh-specific "CCR" and "CCR2" by "SH_" 2014-03-04 07:55:49 -08:00
cpu-sh2a/cpu sh: prefix sh-specific "CCR" and "CCR2" by "SH_" 2014-03-04 07:55:49 -08:00
cpu-sh3/cpu sh: prefix sh-specific "CCR" and "CCR2" by "SH_" 2014-03-04 07:55:49 -08:00
cpu-sh4/cpu sh: prefix sh-specific "CCR" and "CCR2" by "SH_" 2014-03-04 07:55:49 -08:00
cpu-sh4a/cpu sh: dma: More legacy cpu dma chainsawing. 2012-05-19 20:38:50 +09:00
cpu-sh5/cpu sh: Tidy up some of the cpu legacy dma header mess. 2012-05-19 18:30:31 +09:00
mach-common/mach sh: legacy PCI evt2irq migration. 2012-05-18 17:42:29 +09:00
mach-dreamcast/mach sh: Kill off MAX_DMA_ADDRESS leftovers. 2012-05-19 18:50:09 +09:00
mach-ecovec24/mach UAPI: (Scripted) Convert #include "..." to #include <path/...> in kernel system headers 2012-10-02 18:01:25 +01:00
mach-kfr2r09/mach sh: kfr2r09: Use lv5207lp backlight 2013-07-17 10:06:18 +09:00
mach-landisk/mach sh: landisk evt2irq migration. 2012-05-18 16:51:36 +09:00
mach-migor/mach fbdev: sh_mobile_lcdc: Remove board configuration board_data field 2012-03-12 22:40:49 +01:00
mach-sdk7786/mach sh: mach-sdk7786: Handle baseboard NMI source selection. 2010-12-17 18:58:04 +09:00
mach-se/mach Merge branch 'sh/dynamic-irq-cleanup' into sh-latest 2012-06-13 12:12:41 +09:00
mach-sh03/mach
mach-x3proto/mach sh: mach-x3proto: Support for baseboard GPIOs. 2010-10-04 02:59:29 +09:00
uapi/asm sh: switch to generic old sigaction() 2013-02-03 18:16:16 -05:00