Date: Fri, 4 Jun 2010 08:20:49 -0400 From: John Baldwin <jhb@freebsd.org> To: Dave Hayes <dave@jetcafe.org> Cc: Garrett Cooper <yanefbsd@gmail.com>, freebsd-stable@freebsd.org, Clifton Royston <cliftonr@lava.net>, Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: Locking a file backed mdconfig into memory Message-ID: <201006040820.49741.jhb@freebsd.org> In-Reply-To: <201006040937.o549bEFt054288@hugeraid.jetcafe.org> References: <201005272348.o4RNmgWh014243@hugeraid.jetcafe.org> <201006031029.00588.jhb@freebsd.org> <201006040937.o549bEFt054288@hugeraid.jetcafe.org>
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On Friday 04 June 2010 5:37:14 am Dave Hayes wrote: > John Baldwin <jhb@freebsd.org> writes: > > On Wednesday 02 June 2010 6:37:59 pm Dave Hayes wrote: > >> John Baldwin <jhb@freebsd.org> writes: > >> > Ok, if you are using a stock mfsroot from a release build, that should > >> > work fine. If you have built a custom mfsroot that is larger, then > >> > you may need to increase NKPT on i386. In very recent 7 and later you > >> > can do this by setting it to a new value in your kernel config. In > >> > older versions you can do this by manually adding a #define to set a > >> > new value of NKPT in opt_global.h or hacking on the source directly. > >> > >> Is this also true for amd64 (which is my particular target)? > > > > It might be. What is the panic you are seeing? > > I can't see the panic as it repeatedly scrolls across the console screen > faster than I can read it. In this case the mfsroot is around 275MB. > > I have noticed that sometimes I can build an mfsroot that does not crash > of this size. Hmmm, I would just try increasing NKPT then. You might have to poke around in sys/amd64 to see what the default size is and how to tune it. -- John Baldwin
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