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Date: Thu, 16 Jan 2014 20:43:51 -0500 From: Luiz Capitulino <lcapitulino@...hat.com> To: Rusty Russell <rusty@...tcorp.com.au> Cc: linux-kernel@...r.kernel.org, kvm@...r.kernel.org, riel@...hat.com, aarcange@...hat.com, aquini@...hat.com, mst@...hat.com, vdavydov@...allels.com, amit.shah@...hat.com, dfediuck@...hat.com, alitke@...hat.com Subject: Re: [RFC PATCH 3/4] virtio_balloon: add pressure notification via a new virtqueue On Thu, 16 Jan 2014 20:38:19 -0500 Luiz Capitulino <lcapitulino@...hat.com> wrote: > > What does qemu do with this information? > > There are two possible scenarios: > > 1. The balloon driver is currently inflating when it gets under > pressure > > QEMU resets "num_pages" to the current balloon size. This > cancels the on-going inflate > > 2. The balloon driver is not inflating, eg. it's possibly sleeping > > QEMU issues a deflate > > But note that those scenarios are not supposed to be used with the > current device, they are part of the automatic ballooning feature. > I CC'ed you on the QEMU patch, you can find it here case you didn't > see it: > > http://marc.info/?l=kvm&m=138988966315690&w=2 By "current device" I meant "outside of automatic ballooning scope". -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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