Date: Sat, 01 Sep 2007 19:34:41 +0200 From: Kris Kennaway <kris@FreeBSD.org> To: Per olof Ljungmark <peo@intersonic.se> Cc: freebsd-questions@freebsd.org, gabor@FreeBSD.org Subject: Re: g_vfs write error = 28, bad memory? Message-ID: <46D9A2B1.7090503@FreeBSD.org> In-Reply-To: <46D9A14D.6080005@intersonic.se> References: <46D90C6B.8070807@intersonic.se> <46D947BC.8000201@FreeBSD.org> <46D986F8.8090707@intersonic.se> <46D98F2F.9060608@FreeBSD.org> <46D9A14D.6080005@intersonic.se>
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Per olof Ljungmark wrote:
> Kris Kennaway wrote:
>> Per olof Ljungmark wrote:
>>> Kris Kennaway wrote:
>>>> Per olof Ljungmark wrote:
>>>>> I use a memory file system for some tmp files and last night I saw
>>>>> this, followed by a reboot. Bad memory? 6-STABLE from April..
>>>>>
>>>>> foo-bar kernel: g_vfs_done():md0[WRITE(offset=259244032,
>>>>> length=131072)]error = 28
>>>>> foo-bar kernel: g_vfs_done():md0[WRITE(offset=259375104,
>>>>> length=131072)]error = 28
>>>>> [ten more lines...]
>>>>> [reboot]
>>>>>
>>>>> Thanks,
>>>>
>>>> #define ENOSPC 28 /* No space left on device */
>>>>
>>>> You are probably (incorrectly) using a malloc backed disk. Use swap
>>>> backing and you won't panic when memory is low.
>>>
>>> Yes, sounds likely, thanks. One more question then, where is the md
>>> information stored through a reboot? I did not edit rc.conf or fstab
>>> or kernel config but still /dev/md0 came back up. Hmmm.
>>
>> It's not, unless something is explicitly creating it each time you
>> boot. Perhaps you are using a rc.conf setting that creates a md /tmp.
>
> Indeed, here it was:
>
> amavisd_enable="YES"
> amavisd_ram="512m"
>
> and the line in rc.d/amavisd
> mdmfs -M -s ${amavisd_ram} -w vscan:vscan md /var/amavis/tmp || true
> for some reason creates a malloc based mfs
>
> Perhaps I should check this with the maintainer...
>
>
Yes, malloc backing for md should be used in almost no situations.
Kris
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