On Tue, Apr 28, 2015 at 01:42:10PM -0700, Andy Lutomirski wrote: > At some point, I'd like to implement PCID on x86 (if no one beats me > to it, and this is a low priority for me), which will allow us to skip > expensive TLB flushes while context switching. I have no idea whether > ARM can do something similar. I talked with Dave about implementing PCID and he thinks that it will be net loss. TLB entries will live longer and it means we would need to trigger more IPIs to flash them out when we have to. Cost of IPIs will be higher than benifit from hot TLB after context switch. Do you have different expectations? -- Kirill A. Shutemov -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>