Re: [Yaffs] When yaffs perform GC?

there is a description of the conditions that GC will activate in
HowYaffsWorks from memory.



On Wed, Aug 3, 2011 at 9:17 AM, Charles Manning <manningc2@actrix.gen.nz>wrote:

> On Wednesday 03 August 2011 02:20:32 you wrote:
> > Hi,
> >
> > I saw those code:
> > if (!dev->is_checkpointed) {
> > urgency = yaffs_bg_gc_urgency(dev);
> > gc_result = yaffs_bg_gc(dev, urgency);
> > if (urgency > 1)
> > next_gc = now + HZ / 20 + 1;
> > else if (urgency > 0)
> > next_gc = now + HZ / 10 + 1;
> > else
> > next_gc = now + HZ * 2;
> > }
> >
> > Does it means yaffs will perform gc at least HZ*2? I mean nomorlly the HZ
> > is around 1sec, does the gc frequence too often? Thank you.
>
> It will only do the gc checking this often.
>
> That does not necessarily mean actual gc will happen.
>
> >
> > > From: manningc2@actrix.gen.nz
> > > To: yaffs@lists.aleph1.co.uk
> > > Date: Tue, 2 Aug 2011 09:48:56 +1200
> > > Subject: Re: [Yaffs] When yaffs perform GC?
> > >
> > > On Tuesday 02 August 2011 04:10:11 HuangAlex wrote:
> > > > Hi guys,
> > > >
> > > > I wonder when yaffs2 perform garbage collection, is every time power
> > > > on/off the device or just perform gc when the reseved blocks is less
> > > > than some specific value. Thank you.
> > >
> > > Have you read HowYaffsWorks?
> > >
> > > If you look at yaffs_guts.c and search for garbage or gc you will see
> the
> > > conditions under which gc is done.
> > >
> > > -- CHarles
> > >
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>
>
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