Re: [Qemu-devel] [RESEND][PATCH 1.7] migration: drop MADVISE_DONT_NEED for incoming zero pages

2013-11-18 Thread Peter Lieven
On 24.10.2013 11:14, Paolo Bonzini wrote: Il 24/10/2013 08:21, Peter Lieven ha scritto: Additionally we memmap target memory so it is essentially zero initialized (except for e.g. option roms and bios which are loaded into target memory although they shouldn't). It was reported recently that

Re: [Qemu-devel] [RESEND][PATCH 1.7] migration: drop MADVISE_DONT_NEED for incoming zero pages

2013-11-18 Thread Paolo Bonzini
Il 18/11/2013 13:48, Peter Lieven ha scritto: On 24.10.2013 11:14, Paolo Bonzini wrote: Il 24/10/2013 08:21, Peter Lieven ha scritto: Additionally we memmap target memory so it is essentially zero initialized (except for e.g. option roms and bios which are loaded into target memory although

Re: [Qemu-devel] [RESEND][PATCH 1.7] migration: drop MADVISE_DONT_NEED for incoming zero pages

2013-10-24 Thread Paolo Bonzini
Il 24/10/2013 08:21, Peter Lieven ha scritto: Additionally we memmap target memory so it is essentially zero initialized (except for e.g. option roms and bios which are loaded into target memory although they shouldn't). It was reported recently that this madvise causes a performance