Re: [Yaffs] When yaffs perform GC?

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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