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From: | Paolo Bonzini |
Subject: | Re: [Qemu-devel] [PATCH 13/15] exec: use mmap for PhysPageMap->nodes |
Date: | Tue, 28 Jun 2016 12:43:56 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 |
On 28/06/2016 11:01, Peter Lieven wrote: > this was causing serious framentation in conjunction with the > subpages since RCU was introduced. The node space was allocated > at approx 32kB then reallocted to approx 75kB and this a few hundred > times at startup. And thanks to RCU the freeing was delayed. > > Signed-off-by: Peter Lieven <address@hidden> The size of the node from the previous as->dispatch could be used as a hint for the new one perhaps, avoiding the reallocation? Paolo
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