Date: Wed, 11 Aug 1999 14:39:32 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Juha Nurmela <junki@qn-lpr2-165.quicknet.inet.fi> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: mmap bug Message-ID: <199908112139.OAA78172@apollo.backplane.com> References: <Pine.BSF.4.05.9908120022470.422-100000@pena.oh5nxo.ampr.org>
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:If the latter mmap.c is allowed to fill up filesystem, -current hangs in
:
:/kernel: pid 2 (pagedaemon), uid 0 on /: file system full
:/kernel: vnode_pager_putpages: I/O error 28
:/kernel: vnode_pager_putpages: residual I/O 16384 at 880
:
:...repeating the last two lines, gradually increasing pindex,
:residual changing to 64kB.
:
:Juha
It should stop eventually when it runs out of pages in the map. This
is what happens when you map a file, ftruncate() it to be a certain
size (all zero-fill), and then touch the pages forcing the filesystem
to allocate actual blocks for the data and the filesystem isn't big
enough. The system doesn't know the filesystem isn't big enough until
it actually tries to flush the pages.
-Matt
Matthew Dillon
<dillon@backplane.com>
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