From mboxrd@z Thu Jan  1 00:00:00 1970
From: erik quanstrom <quanstro@quanstro.net>
Date: Tue, 26 Mar 2013 14:56:40 -0400
To: 9fans@9fans.net
Message-ID: <ffc25e981af674a1a19a514a3670743d@ladd.quanstro.net>
In-Reply-To: <86d7b1bda15f1dbeba599814a88c12dc@rei2.9hal>
References: <86d7b1bda15f1dbeba599814a88c12dc@rei2.9hal>
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Subject: Re: [9fans] Disk backup?
Topicbox-Message-UUID: 3690b124-ead8-11e9-9d60-3106f5b1d025

> int
> cwfree(Device *dev, Off addr)
> {
> 	int state;
>
> 	if(dev->type == Devcw) {
> 		state = cwio(dev, addr, 0, Ofree);
> 		if(state != Cdirty)
> 			return 1;	/* do not put in freelist */
> 	}
> 	return 0;			/* put in freelist */
> }
>
> now, such a Cdirty block could just sit in the freelist for a while no?
> while the filesystem does many dump generations. if that Cdirty block
> becomes part of the filesystem again because it is allocated, then
> the next cwrecur() should pick it up and call split() on it.

why wouldn't it be marked for dump on the very
first dump?

- erik