FreeBSD Bugzilla – Attachment 42761 Details for
Bug 66621
Document fix for "kmem_map too small panics"
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[patch]
file.diff
file.diff (text/plain), 2.23 KB, created by
Stefan Bethke
on 2004-05-13 22:10:21 UTC
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file.diff
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Creator:
Stefan Bethke
Created:
2004-05-13 22:10:21 UTC
Size:
2.23 KB
patch
obsolete
>Index: book.sgml >=================================================================== >RCS file: /home/ncvs/doc/en_US.ISO8859-1/books/faq/book.sgml,v >retrieving revision 1.618 >diff -u -C10 -r1.618 book.sgml >cvs diff: conflicting specifications of output style >*** book.sgml 11 May 2004 13:29:47 -0000 1.618 >--- book.sgml 13 May 2004 20:55:09 -0000 >*************** >*** 3082,3101 **** >--- 3082,3125 ---- > <question id="asusk7v-boot-failure"> > <para>The boot floppy hangs on a system with an ASUS K7V > motherboard. How do I fix this?</para> > </question> > > <answer> > <para>Go into the BIOS setup and disable the <quote>boot virus > protection</quote>.</para> > </answer> > </qandaentry> >+ >+ <qandaentry> >+ <question id="kmem-map-too-small"> >+ <para>My system has more than 1 GB of RAM, and I'm getting panics >+ with <quote>kmem_map too small</quote> messages. What is >+ wrong?</para> >+ </question> >+ >+ <answer> >+ <para>Normally, FreeBSD determines a number of kernel parameters, >+ such as the maximum number of open files that can be opened >+ concurrently, from the amount of memory installed in the >+ system. On systems with one gigabyte of RAM or more, this >+ <quote>auto-sizing</quote> mechanism may choose values that are >+ too large, leading to poor performance, or even to >+ panics.</para> >+ <para>In this particular case, the kernel memory allocation map >+ is too small for the amount of memory the kernel believes it >+ should be able to allocate, hence the panic. Compile your own >+ kernel, and add the <option>VM_KMEM_SIZE_MAX</option> to your >+ kernel configuration file. Limiting the maximum size to 400 MB >+ (<option>VM_KMEM_SIZE_MAX 419430400</option>). </para> >+ </answer> >+ </qandaentry> > </qandaset> > </chapter> > > <chapter id="troubleshoot"> > <title>Troubleshooting</title> > > <qandaset> > <qandaentry> > <question id="awre"> > <para>What do I do when I have bad blocks on my hard drive?</para>
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bug 66621
: 42761