Messages in this thread | | | Date | Mon, 30 Nov 1998 11:18:16 GMT | From | "Stephen C. Tweedie" <> | Subject | Re: [2.1.130-3] Page cache DEFINATELY too persistant... feature? |
| |
Hi,
On Sat, 28 Nov 1998 14:44:06 +0100 (MET), R.E.Wolff@BitWizard.nl (Rogier Wolff) said:
> I'm not sure that this is possible. We will need to "throttle at the > source" eventually. I can write an application that writes a file at > 50Mb per second (try "dd if=/dev/zero of=testfile"), and the disk is > never going to keep up with that.
We do. The buffer cache grows with the low GFP_BUFFER priority, and even then grows only if the cache is within a certain limit and we have enough free space. Exhaust those limits and it starts recycling existing buffers, which is a natural at-source throttle for buffer writes.
--Stephen
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |