Messages in this thread | | | From | David Laight <> | Subject | RE: [PATCH 06/18] x86, barrier: stop speculation for failed access_ok | Date | Mon, 8 Jan 2018 12:00:28 +0000 |
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From: Linus Torvalds > Sent: 07 January 2018 19:47 ... > Also, people definitely *are* noticing the performance issues with the > current set of patches, and they are causing real problems. Go search > for reports of Amazon AWS slowdowns.
Try over 35% slowdown.... Given that AWS instance runs known code (user and kernel) why do we need to worry about any of these sideband attacks?
David
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