Max Filippov 87962c4db7 xtensa: flush TLB entries for pages of non-current mm correctly ... Sometimes under high memory pressure one process gets a page of another process, which manifests itself with an invalid instruction exception. This happens because flush_tlb_page fails to clear TLB entries when called with vma that does not belong to current mm, because it does not set RASID appropriately. When page reclaiming mechanism swaps physical pages out replacing their PTEs with none or swap PTEs, it calls flush_tlb_page. Later physical page may be reused elsewhere, but the stale TLB mapping still refers to it, allowing process that owned the mapping to see the new state of that physical page. Put ASID of the mm that owns vma to the RASID to fix that issue. Also replace otherwise meaningless local_save_flags with local_irq_save. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>		2013-06-05 10:14:19 -07:00
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cache.c	xtensa: clean up files to make them code-style compliant	2012-12-18 21:10:25 -08:00
fault.c	xtensa: clean up files to make them code-style compliant	2012-12-18 21:10:25 -08:00
init.c	mm/xtensa: use common help functions to free reserved pages	2013-04-29 15:54:31 -07:00
Makefile	xtensa: nommu support	2009-04-02 23:41:50 -07:00
misc.S	xtensa: clean up files to make them code-style compliant	2012-12-18 21:10:25 -08:00
mmu.c	xtensa: add MMU v3 support	2013-05-09 01:07:09 -07:00
tlb.c	xtensa: flush TLB entries for pages of non-current mm correctly	2013-06-05 10:14:19 -07:00