Re: [RFC][PATCH 0/8] Critical Page Pool

From: Chris Wright
Date: Fri Nov 18 2005 - 14:56:42 EST

* Matthew Dobson (colpatch@xxxxxxxxxx) wrote:
> /proc/sys/vm/critical_pages: write the number of pages you want to reserve
> for the critical pool into this file

How do you size this pool? Allocations are interrupt driven, so how to you
ensure you're allocating for the cluster network traffic you care about?

> /proc/sys/vm/in_emergency: write a non-zero value to tell the kernel that
> the system is in an emergency state and authorize the kernel to dip into
> the critical pool to satisfy critical allocations.

Seems odd to me. Why make this another knob? How did you run to set this
flag if you're in emergency and kswapd is going nuts?

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