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Date:      Sun, 20 Oct 2019 17:43:17 -0700
From:      bob prohaska <fbsd@www.zefox.net>
To:        Warner Losh <imp@bsdimp.com>
Cc:        freebsd-arm@freebsd.org
Subject:   Re: Swap_pager messages when no swap is in use
Message-ID:  <20191021004317.GB14127@www.zefox.net>
In-Reply-To: <CANCZdfqpH61iaZFXJsdTJhJE%2B95=FXvit6AjvomFOZkMe=8XYg@mail.gmail.com>
References:  <20191021000433.GA14127@www.zefox.net> <CANCZdfqpH61iaZFXJsdTJhJE%2B95=FXvit6AjvomFOZkMe=8XYg@mail.gmail.com>

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On Sun, Oct 20, 2019 at 06:14:37PM -0600, Warner Losh wrote:
> On Sun, Oct 20, 2019, 6:04 PM bob prohaska <fbsd@www.zefox.net> wrote:
> 
> > While running svnlite to update sources on a Pi3 running -currrent
> > I was surprised to notice a flurry of
> > swap_pager: indefinite wait buffer: bufobj: 0, blkno: 133095, size: 4096
> > swap_pager: indefinite wait buffer: bufobj: 0, blkno: 136056, size: 4096
> > swap_pager: indefinite wait buffer: bufobj: 0, blkno: 140560, size: 4096
> > swap_pager: indefinite wait buffer: bufobj: 0, blkno: 134290, size: 8192
> > swap_pager: indefinite wait buffer: bufobj: 0, blkno: 124869, size: 16384
> > swap_pager: indefinite wait buffer: bufobj: 0, blkno: 125113, size: 4096
> > swap_pager: indefinite wait buffer: bufobj: 0, blkno: 142799, size: 4096
> > messages when no swap seemed to be in use. Gstat reported much congestion
> > of the microSD card, holding / and half the swap, but there was no obvious
> > activity reading or writing swap, just the root partition.
> >
> > Should this be considered normal? It strikes me as very odd.
> >
> 
> It took more than 30s for the IO to complete. Sadly, this is normal for
> cheap SD cards.
> 

Ok, but why is the swapping system complaining when there's no swapping going on?

Thanks for reading,

bob prohaska




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