Am 28.03.2014 um 11:02 schrieb Peter Lieven <p...@kamp.de>: > On 21.03.2014 13:06, Paolo Bonzini wrote: >> Il 21/03/2014 12:49, Peter Lieven ha scritto: >>> A 10G logical volume was created and filled with random data. >>> Then the logical volume was exported via qemu-img convert to an iscsi >>> target. >>> Before the export was started all caches of the linux kernel where dropped. >>> >>> Old behavior: >>> - The convert process took 3m45s and the buffer cache grew up to 9.67 GB >>> close >>> to the end of the conversion. After qemu-img terminated all the buffers >>> were >>> freed by the kernel. >>> >>> New behavior with the -N switch: >>> - The convert process took 3m43s and the buffer cache grew up to 15.48 MB >>> close >>> to the end with some small peaks up to 30 MB durine the conversion. >>> >>> Signed-off-by: Peter Lieven <p...@kamp.de> >>> --- >>> v1->v2: - added test example to commit msg >>> - added -N knob to qemu-img >> >> I'm sorry, I cannot find the original discussion. Why is the new knob >> needed? >
Is there any more info needed or modifications wanted? Thanks, Peter
