search for: did_i_migr

Displaying 5 results from an estimated 5 matches for "did_i_migr".

2020 Jul 07
2
[RFC]: mm,power: introduce MADV_WIPEONSUSPEND
On Fri 03-07-20 15:29:22, Jann Horn wrote: > On Fri, Jul 3, 2020 at 1:30 PM Michal Hocko <mhocko at kernel.org> wrote: > > On Fri 03-07-20 10:34:09, Catangiu, Adrian Costin wrote: > > > This patch adds logic to the kernel power code to zero out contents of > > > all MADV_WIPEONSUSPEND VMAs present in the system during its transition > > > to any suspend
2020 Jul 07
2
[RFC]: mm,power: introduce MADV_WIPEONSUSPEND
On Fri 03-07-20 15:29:22, Jann Horn wrote: > On Fri, Jul 3, 2020 at 1:30 PM Michal Hocko <mhocko at kernel.org> wrote: > > On Fri 03-07-20 10:34:09, Catangiu, Adrian Costin wrote: > > > This patch adds logic to the kernel power code to zero out contents of > > > all MADV_WIPEONSUSPEND VMAs present in the system during its transition > > > to any suspend
2020 Jul 07
3
[RFC]: mm,power: introduce MADV_WIPEONSUSPEND
...; > application has to be changed anyway then why not simply use a > > transparent and proper signaling mechanism like poll on a fd. That > > The goal is to have cryprographically-safe get_random_number() with 0 > syscalls. > > You'd need to do: > > if (!poll(did_i_migrate)) { > use_prng_seed(); > if (poll(did_i_migrate)) { > /* oops_they_migrated_me_in_middle_of_computation, > lets_redo_it() */ > goto retry: > } > } > > Which means two syscalls.. Is this a real problem though? Do we have any ac...
2020 Jul 07
3
[RFC]: mm,power: introduce MADV_WIPEONSUSPEND
...; > application has to be changed anyway then why not simply use a > > transparent and proper signaling mechanism like poll on a fd. That > > The goal is to have cryprographically-safe get_random_number() with 0 > syscalls. > > You'd need to do: > > if (!poll(did_i_migrate)) { > use_prng_seed(); > if (poll(did_i_migrate)) { > /* oops_they_migrated_me_in_middle_of_computation, > lets_redo_it() */ > goto retry: > } > } > > Which means two syscalls.. Is this a real problem though? Do we have any ac...
2020 Jul 07
0
[RFC]: mm,power: introduce MADV_WIPEONSUSPEND
...nd the expected usecase but if the target > application has to be changed anyway then why not simply use a > transparent and proper signaling mechanism like poll on a fd. That The goal is to have cryprographically-safe get_random_number() with 0 syscalls. You'd need to do: if (!poll(did_i_migrate)) { use_prng_seed(); if (poll(did_i_migrate)) { /* oops_they_migrated_me_in_middle_of_computation, lets_redo_it() */ goto retry: } } Which means two syscalls.. Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky,...