search for: 2mbytes

On Wed, Mar 09, 2016 at 05:41:39PM +0200, Michael S. Tsirkin wrote: > On Wed, Mar 09, 2016 at 05:28:54PM +0300, Roman Kagan wrote: > > For (1) I've been trying to make a point that skipping clean pages is > > much more likely to result in noticable benefit than free pages only. > > I guess when you say clean you mean zero? No I meant clean, i.e. those that could be

On Wed, Mar 09, 2016 at 05:41:39PM +0200, Michael S. Tsirkin wrote: > On Wed, Mar 09, 2016 at 05:28:54PM +0300, Roman Kagan wrote: > > For (1) I've been trying to make a point that skipping clean pages is > > much more likely to result in noticable benefit than free pages only. > > I guess when you say clean you mean zero? No I meant clean, i.e. those that could be

...it should be split up so we improve them for everyone and not just one specific workload. > it's just the granularity that makes things slow and > stands in the way. So we could request a specific page size/alignment from guest. Send guest request to give us memory in aligned units of 2Mbytes, and then host can treat each of these as a single huge page. > Roman. -- MST

...f=/dev/zero of=btrfs-small.img bs=1M count=1 > ls -lh btrfs-small.img -rw-rw-r--. 1 rock rock 1.0M Oct 24 09:51 btrfs-small.img > mkfs.btrfs btrfs-small.img -rw-rw-r--. 1 rock rock 2.0M Oct 24 09:53 btrfs-small.img Here you can see the original img file''s size goes larger to 2Mbytes. Signed-off-by: Rock Lee <zimilo@code-trick.com> --- utils.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/utils.c b/utils.c index 205e667..3c88d2e 100644 --- a/utils.c +++ b/utils.c @@ -441,7 +441,7 @@ static int zero_blocks(int fd, off_t start, size_t len...