Re: x86 ptep_get_and_clear question

[Jamie Lokier]

Linus Torvalds wrote:
> So the only case that ends up being fairly heavy may be a case that is
> very uncommon in practice (only for unmapping shared mappings in
> threaded programs or the lazy TLB case).

I can think of one case where performance is considered quite important:
mprotect() is used by several garbage collectors, including threaded
ones.  Maybe mprotect() isn't the best primitive for those anyway, but
it's what they have to work with atm.

-- Jamie