Messages in this thread | | | Date | Tue, 4 Jul 2023 09:02:22 +0200 | From | Juergen Gross <> | Subject | Re: [PATCH v3] xen: speed up grant-table reclaim |
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On 27.06.23 19:22, Demi Marie Obenour wrote: > When a grant entry is still in use by the remote domain, Linux must put > it on a deferred list. Normally, this list is very short, because > the PV network and block protocols expect the backend to unmap the grant > first. However, Qubes OS's GUI protocol is subject to the constraints > of the X Window System, and as such winds up with the frontend unmapping > the window first. As a result, the list can grow very large, resulting > in a massive memory leak and eventual VM freeze. > > To partially solve this problem, make the number of entries that the VM > will attempt to free at each iteration tunable. The default is still > 10, but it can be overridden at compile-time (via Kconfig), boot-time > (via a kernel command-line option), or runtime (via sysfs).
You are still mentioning Kconfig.
For the sysfs entry you should add something under Documentation/ABI. Sorry I didn't spot this omission previously.
Juergen [unhandled content-type:application/pgp-keys][unhandled content-type:application/pgp-signature] | |