Re: sync hanging

[Hans Reiser <reiser@namesys.com>]

Corin Hartland-Swann wrote:
> 
> Hi Hans,
> 
> On Tue, 21 Aug 2001, Hans Reiser wrote:
> > Corin Hartland-Swann wrote:
> > > I'm using kernel 2.4.8-ac2 on a Dual PIII-1000 with 4096M RAM, and a
> > > reiserfs filesystem on a RAID-1 mirror of two 76GB UDMA disks, and I'm
> > > experiencing a strange problem after the machine has been running for a
> > > while.
> > >
> > > Every now and again, running sync(1) (i.e. the program) seems to hang and
> > > end up in state D (uninterruptible sleep). There is no way to kill it
> > > (even with SIGKILL but I assume that this is typical for state D
> > > processes.
> > >
> > > Does anyone have any idea what may be causing this? I have searched the
> > > archives and couldn't find anything similar.
> >
> > turn off highmem, known bug, I don't know if it is solved yet.
> 
> Is 2G RAM OK (by manually changing __PAGE_OFFSET ?)
> 

surf through lkm postings for more info on this bug, it is not in my area of
expertise.

> Is this directly related to reiserfs (i.e. will it go away if I go back to
> using ext2 or switch to xfs?)

it is completely unrelated to reiserfs.

> 
> How serious is the problem? Can I get away with using it as is (with
> highmem) on a production server or will that cause serious repercussions?

you will be screwed if you use it on a production server, as best I understand
it.

> 
> Thanks,
> 
> Corin
> 
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