Date: Fri, 2 Sep 2022 17:06:02 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Mateusz Guzik <mjguzik@gmail.com> Cc: freebsd-current@freebsd.org Subject: Re: kernel-side thread stack swapping Message-ID: <YxINyjnFDt8kU41j@kib.kiev.ua> In-Reply-To: <CAGudoHFh5H721kcQT0zDdErD%2Bj%2B0YA6Hz=%2Bjarg9R1jdttfx-A@mail.gmail.com> References: <CAGudoHFh5H721kcQT0zDdErD%2Bj%2B0YA6Hz=%2Bjarg9R1jdttfx-A@mail.gmail.com>
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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.
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