Messages in this thread | | | From | David Laight <> | Subject | RE: [PATCH] /dev/zero: also implement ->read | Date | Mon, 7 Sep 2020 08:18:13 +0000 |
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From: Christophe Leroy > Sent: 07 September 2020 05:44 ... > If you are talking about the tests around the set_fs series from > Christoph, I identified that the degradation was linked to > CONFIG_STACKPROTECTOR_STRONG being selected by default, which provides > unreliable results from one patch to another, GCC doing some strange > things linked to unrelated changes. > > With CONFIG_STACKPROTECTOR set to N, I get stable performance and no > degradation with any of the patches of the set_fs series.
Ah I didn't spot that response going through.
Sounds like that option should be disabled if it causes that much of a performance drop.
David
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