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From: Dan Cross <crossd@gmail.com>
To: 9fans <9fans@9fans.net>
Subject: Re: [9fans] v9fs vs mmap (not quite SOLVED)
Date: Wed, 27 Oct 2021 08:31:02 -0400	[thread overview]
Message-ID: <CAEoi9W5_uKpYy0MMw5T99Kq7911Tp=kZbYvS4CGww-fPM-RzPQ@mail.gmail.com> (raw)
In-Reply-To: <811fe89f74db52b9e1eaee440967c8dd@hamnavoe.com>

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On Wed, Oct 27, 2021 at 6:56 AM Richard Miller <9fans@hamnavoe.com> wrote:

> > Skip, did you specify -o cache=mmap when mounting diod service
> > for the go build experiment?
>
> I tried it myself using local diod and cache=mmap. I get a similar
> SIGBUS on instruction fetch again. Conclusion: as Bakul says, now
> I'm debugging linux. Not going there, thanks.
>
> Going further off-topic for 9fans, sorry:
>
> I thought it would be clever to update the linux client to a newer
> kernel (4.19 was the latest I could find for debian 9). That
> didn't go well: booting the new kernel fails with the message
>   Failed to find cpu0 device node
>
> Does anyone know if it's feasible to do an out-of-tree build
> of v9fs kernel modules (9p, 9pnet?) from current source [where
> is it?] and use them with my old 4.9 kernel?
>

You can certainly try to do a _build_, and you may even get a shared object
of some kind. Perhaps the question could be rephrased as, "will such a
built artifact work in an older kernel?" and for that, I'm afraid all bets
are off.

What, precisely, is your use case? I understood from your earlier note that
you'd rather not keep data on Linux if you don't have to. But if you're
only building, and the "data" is just a cloned git repository and object
files and binaries, I'd reiterate my suggestion of plan 9 mounting a
user-level 9P server from Linux instead of Linux trying to mount a 9P
server from plan9: the data on Linux might be thought of as a cache, that's
easily reconstructable if necessary. Perhaps another question is, why not
build directly on plan9? Bootstrapping a toolchain, perhaps?

        - Dan C.

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  reply	other threads:[~2021-10-27 12:31 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-24 11:03 [9fans] v9fs vs mmap Richard Miller
2021-10-24 19:50 ` [9fans] v9fs vs mmap (SOLVED) Richard Miller
2021-10-24 22:31   ` Conor Williams
2021-10-25 11:04   ` [9fans] v9fs vs mmap (not quite SOLVED) Richard Miller
2021-10-25 23:53     ` Conor Williams
2021-10-26  9:22       ` Richard Miller
2021-10-26 10:51     ` Richard Miller
2021-10-26 15:53       ` Dan Cross
2021-10-26 16:06         ` Conor Williams
2021-10-26 16:51         ` Richard Miller
2021-10-26 18:17           ` Skip Tavakkolian
2021-10-26 18:54             ` Conor Williams
2021-10-26 19:09             ` Richard Miller
2021-10-26 19:33               ` Skip Tavakkolian
2021-10-26 19:36                 ` Skip Tavakkolian
2021-10-26 23:45                   ` Skip Tavakkolian
2021-10-26 23:57                     ` Charles Forsyth
2021-10-27  8:27                       ` Richard Miller
2021-10-27 10:55                         ` Richard Miller
2021-10-27 12:31                           ` Dan Cross [this message]
2021-10-27 13:15                             ` Richard Miller
2021-10-27 13:20                               ` Dan Cross
2021-10-27 14:10                                 ` Richard Miller
2021-10-27 14:14                                   ` arnold
2021-10-27 14:39                                     ` Richard Miller
2021-10-27 14:45                                       ` arnold
2021-10-27 14:31                                   ` Dan Cross
2021-10-27 15:02                           ` Bakul Shah
2021-10-27 15:37                             ` Charles Forsyth
2021-10-27 16:34                         ` Skip Tavakkolian
2021-10-27 18:37                           ` Richard Miller
2021-10-27 19:12                             ` Skip Tavakkolian
2021-10-27 19:30                               ` [9fans] v9fs vs mmap (now SOLVED, we hope) Richard Miller
2021-10-27 20:18                                 ` Skip Tavakkolian
2021-11-03 14:44                                   ` Conor Williams
2021-11-03 16:39                                     ` Conor Williams
2021-11-01  2:58                               ` [9fans] v9fs vs mmap (not quite SOLVED) Conor Williams
2021-11-04  0:32                                 ` Conor Williams
2021-11-04  3:15                                   ` Conor Williams
2021-11-04 11:49                                     ` Conor Williams
2021-11-05  3:16                                       ` Conor Williams
2021-11-05 10:21                                     ` Kenji Okamoto
2021-11-05 13:44                                       ` Conor Williams
2021-11-05 13:56                                         ` Conor Williams
2021-11-21  4:21                                           ` Conor Williams
2021-10-27  0:34                     ` Conor Williams

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