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| H A D | cputlb.c | diff 3cea94bbc97180dd2de78993982645b11405b3b2 Wed Jan 16 11:01:12 CST 2019 Emilio G. Cota <cota@braap.org> cputlb: do not evict empty entries to the vtlb
Currently we evict an entry to the victim TLB when it doesn't match
the current address. But it could be that there's no match because
the current entry is empty (i.e. all -1's, for instance via tlb_flush).
Do not evict the entry to the vtlb in that case.
This change will help us keep track of the TLB's use rate, which
we'll use to implement a policy for dynamic TLB sizing.
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <20190116170114.26802-2-cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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