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Re: [K12OSN] Client Ram





Rob Owens wrote:
On Sat, May 26, 2007 at 03:36:15PM -0400, Jim McQuillan wrote:

Rob Owens wrote:
Couldn't Firefox and/or the Xserver be rewritten to behave like this:

1) use only a certain amount of memory for cache
2) when that memory is full, delete the oldest cache
3) when a request comes in for a cached image, deliver it if it's
available, but...
4) if the requested image has been deleted from cache, then re-request the
image from its original source (the internet)
The Xserver doesn't know anything about the internet. It received the image from the client application (firefox). If the Xserver deletes the image, due to memory being full, it would need to tell firefox to resend it. Unfortunately, there's no mechanism for that in the X11 protocol.

Sure it could be added, but you'd have to consider whether that breaks anything in the protocol. Keeping in mind that there's an awful lot of programs out there that depend on the current protocol.

Then couldn't Firefox have the logic built into it to re-retrieve the
image if a problem occurs?  Or are you saying that Firefox would have no
way of knowing that there is a problem?

Certainly firefox could go get the image again, or cache it for itself. the problem is, it has no way of knowing the Xserver has thrown it away.

Jim.


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