From: Warner Losh <imp@bsdimp.com>
To: ron minnich <rminnich@gmail.com>
Cc: TUHS main list <tuhs@minnie.tuhs.org>
Subject: Re: [TUHS] Irix on MIPS -- was kernel mode paged
Date: Thu, 21 Nov 2019 20:24:04 -0700 [thread overview]
Message-ID: <CANCZdfrdWv4JJcvpzsqAoX4+Vv6L4NQyG2xVBpoONBn7eJ6Ocw@mail.gmail.com> (raw)
In-Reply-To: <CAP6exYJXeDHfez=NKFHpNLaEcMjvpsipe8HKnhfmyi=e=D6ksQ@mail.gmail.com>
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On Thu, Nov 21, 2019, 2:12 PM ron minnich <rminnich@gmail.com> wrote:
> I'm looking for a reference to any Unix ports where the kernel ran in
> a non-paged address space and user mode was paged. I could swear this
> was done at some point, and memory says it was on a soft-TLB system
> like the MIPS, to avoid TLB pollution and TLB fault overhead.
>
> But maybe I'm nuts. I am happy to hear either answer.
>
Mips had KSEG0 which didn't go through TLB and was mapped to physical
memory. Some MIPS kernels ran in this space to avoid TLB issues...
Warner
>
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next prev parent reply other threads:[~2019-11-22 3:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-21 21:11 ron minnich
2019-11-22 3:24 ` Warner Losh [this message]
2019-11-25 19:12 ` ron minnich
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