On 9/2/22, Konstantin Belousov <kostik...@gmail.com> wrote: > On Fri, Sep 02, 2022 at 02:05:37PM +0200, Mateusz Guzik wrote: >> Is this really of practical use today? >> >> I have a WIP patch which needs to temporarily store something on the >> stack and should things go wrong enough it will be accessed by UMA, >> which can't handle the fault nor decide to skip the access. >> >> I can add something like td_pinstack or whatever to keep it around, >> but perhaps the entire machinery can be just whacked? > p_hold already does that. >
I only need to protect the one stack and more importantly don't want to take the proc lock to bump p_hold (nor convert it to atomics), it's all thread-local so to speak. -- Mateusz Guzik <mjguzik gmail.com>