| Message ID | 20180724200343.13733-6-lbloch@janustech.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introduction of l2-cache-full option for qcow2 images | expand |
On 07/24/2018 03:03 PM, Leonid Bloch wrote: > Signed-off-by: Leonid Bloch <lbloch@janustech.com> > --- > docs/qcow2-cache.txt | 15 +++++++++++---- > 1 file changed, 11 insertions(+), 4 deletions(-) I'd probably squash this with 3/5 introducing the option. > > diff --git a/docs/qcow2-cache.txt b/docs/qcow2-cache.txt > index 9d261b7da9..ea61585a4b 100644 > --- a/docs/qcow2-cache.txt > +++ b/docs/qcow2-cache.txt > @@ -110,11 +110,12 @@ How to configure the cache sizes > Cache sizes can be configured using the -drive option in the > command-line, or the 'blockdev-add' QMP command. > > -There are three options available, and all of them take bytes: > +There are four options available: > > -"l2-cache-size": maximum size of the L2 table cache > -"refcount-cache-size": maximum size of the refcount block cache > -"cache-size": maximum size of both caches combined > +"l2-cache-size": maximum size of the L2 table cache (bytes, K, M) > +"refcount-cache-size": maximum size of the refcount block cache (bytes, K, M) > +"cache-size": maximum size of both caches combined (bytes, K, M) > +"l2-cache-full": make the L2 cache cover the full image (boolean) > > There are a few things that need to be taken into account: > > @@ -130,6 +131,12 @@ There are a few things that need to be taken into account: > memory as possible to the L2 cache before increasing the refcount > cache size. > > +- If "l2-cache-full" is specified, QEMU will assign enough memory > + to the L2 cache to cover the entire size of the image. > + > +- "l2-cache-size" and "l2-cache-full" can not be set simultaneously, as > + setting "l2-cache-full" already implies a specific size for the L2 cache. > + > - All three "l2-cache-size", "refcount-cache-size", and "cache-size" options > can not be set simultaneously. > Might be a rebase conflict here once you polish the wording in 2/5.
diff --git a/docs/qcow2-cache.txt b/docs/qcow2-cache.txt index 9d261b7da9..ea61585a4b 100644 --- a/docs/qcow2-cache.txt +++ b/docs/qcow2-cache.txt @@ -110,11 +110,12 @@ How to configure the cache sizes Cache sizes can be configured using the -drive option in the command-line, or the 'blockdev-add' QMP command. -There are three options available, and all of them take bytes: +There are four options available: -"l2-cache-size": maximum size of the L2 table cache -"refcount-cache-size": maximum size of the refcount block cache -"cache-size": maximum size of both caches combined +"l2-cache-size": maximum size of the L2 table cache (bytes, K, M) +"refcount-cache-size": maximum size of the refcount block cache (bytes, K, M) +"cache-size": maximum size of both caches combined (bytes, K, M) +"l2-cache-full": make the L2 cache cover the full image (boolean) There are a few things that need to be taken into account: @@ -130,6 +131,12 @@ There are a few things that need to be taken into account: memory as possible to the L2 cache before increasing the refcount cache size. +- If "l2-cache-full" is specified, QEMU will assign enough memory + to the L2 cache to cover the entire size of the image. + +- "l2-cache-size" and "l2-cache-full" can not be set simultaneously, as + setting "l2-cache-full" already implies a specific size for the L2 cache. + - All three "l2-cache-size", "refcount-cache-size", and "cache-size" options can not be set simultaneously.
Signed-off-by: Leonid Bloch <lbloch@janustech.com> --- docs/qcow2-cache.txt | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-)