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From: John Baldwin <jhb@freebsd.org>
To: Alexej Sokolov <bsd.quest@googlemail.com>
Date: Mon, 9 Mar 2009 16:18:32 -0400
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Cc: freebsd-hackers@freebsd.org
Subject: Re: wrong data in remapped buffer
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On Monday 09 March 2009 3:38:55 pm Alexej Sokolov wrote:
> 2009/3/9 John Baldwin <jhb@freebsd.org>
> 
> > On Friday 06 March 2009 11:13:38 am Alexej Sokolov wrote:
> > > Hello,
> > > I try to MALLOC a buffer in kern, then remap it with vm_map_find(), to
> > space
> > > of user process.
> > > Some times the remapped buffer in user space contain incorrect data.
> >
> > What architecture are you using?  On some archs like amd64, small mallocs
> > (<=
> > PAGE_SIZE) don't use the kmem_map or kmem_object.
> >
> > --
> > John Baldwin
> >
> anyway , the error happens only some times... I think there is other reason.
> My hardware is amd64
> % uname -ms
> FreeBSD i386

i386 always uses kmem for malloc(9).

-- 
John Baldwin