![]() The assumption was that update_mmu_cache() (and the equivalent for PMDs) would only be called when the PTE being installed will be accessible by the user. This is not true for code paths originating from remove_migration_pte(). There are dire consequences for placing a non-valid PTE into the TSB. The TLB miss frramework assumes thatwhen a TSB entry matches we can just load it into the TLB and return from the TLB miss trap. So if a non-valid PTE is in there, we will deadlock taking the TLB miss over and over, never satisfying the miss. Just exit early from update_mmu_cache() and friends in this situation. Based upon a report and patch from Christopher Alexander Tobias Schulze. Signed-off-by: David S. Miller <davem@davemloft.net> |
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boot | ||
configs | ||
crypto | ||
include | ||
kernel | ||
lib | ||
math-emu | ||
mm | ||
net | ||
oprofile | ||
power | ||
prom | ||
Kbuild | ||
Kconfig | ||
Kconfig.debug | ||
Makefile |