Messages in this thread | | | From | Andi Kleen <> | Subject | Re: increased vmap_area_lock contentions on "n_tty: Move buffers into n_tty_data" | Date | Wed, 25 Sep 2013 20:20:37 -0700 |
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Lin Ming <minggr@gmail.com> writes: > > Would you like below patch?
The loop body keeps rather complex state. It could easily get confused by parallel RCU changes.
So if the list changes in parallel you may suddenly report very bogus values, as the va_start - prev_end computation may be bogus.
Perhaps it's ok (may report bogus gaps), but it seems a bit risky.
-Andi
-- ak@linux.intel.com -- Speaking for myself only
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