Date: Wed, 31 Mar 1999 09:07:13 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Brian McGovern <bmcgover@cisco.com> Cc: thierry.herbelot@alcatel.fr, bmcgover@cisco.com, questions@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re: MFS Sizes over 470MB? Can't seem to do it... Message-ID: <199903311707.JAA49603@apollo.backplane.com> References: <199903311639.LAA02330@bmcgover-pc.cisco.com>
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:[For anyone tuning in late, I'm having a problem specifying MFS file systems
:in excess of ~500MB without using -F, and I'm trying to understand why. The
:one comment I have received so far is that max MFS size is a function of
:total swap space. I'm now disagreeing...]
:
:Actually, it appears swap size is not an apparent function of MFS file systems.
:Even at a 2GB of swap, MFSs over 507MB (+/-) won't work unless the -F option
:is also given (although I'm not sure of the impact). Therefore, I don't know
:if this qualifies as a bug or not...
Type 'limit'. What is the datasize limit set to?
If you specify a straight size, mfs uses malloc() to reserve the memory,
which is subject to the datasize limit.
If you specify a file, mfs mmap()'s the file, which is not subject to the
datasize limit.
-Matt
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