On 10/9/2023 6:03 PM, yizhou.tang@xxxxxxxxxx wrote: > From: Tang Yizhou <yizhou.tang@xxxxxxxxxx> > > Our system administrator have noted that the names 'rt-to-be' and > 'all-to-idle' in the I/O priority policies table appeared without > explanations, leading to confusion. Let's standardize these names in > line with the naming in the 'attribute' section. > > Additionally, > 1. Correct the interface name to 'io.prio.class'. > 2. Add a table entry of 'promote-to-rt' for consistency. > 3. Fix a typo of 'priority'. > > Suggested-by: Yingfu Zhou <yingfu.zhou@xxxxxxxxxx> > Signed-off-by: Tang Yizhou <yizhou.tang@xxxxxxxxxx> Reviewed-by: Hou Tao <houtao1@xxxxxxxxxx> > --- > Documentation/admin-guide/cgroup-v2.rst | 10 ++++++---- > 1 file changed, 6 insertions(+), 4 deletions(-) > > diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst > index 4ef890191196..10461c73c9a3 100644 > --- a/Documentation/admin-guide/cgroup-v2.rst > +++ b/Documentation/admin-guide/cgroup-v2.rst > @@ -2023,7 +2023,7 @@ IO Priority > ~~~~~~~~~~~ > > A single attribute controls the behavior of the I/O priority cgroup policy, > -namely the blkio.prio.class attribute. The following values are accepted for > +namely the io.prio.class attribute. The following values are accepted for > that attribute: > > no-change > @@ -2052,9 +2052,11 @@ The following numerical values are associated with the I/O priority policies: > +----------------+---+ > | no-change | 0 | > +----------------+---+ > -| rt-to-be | 2 | > +| promote-to-rt | 1 | > +----------------+---+ > -| all-to-idle | 3 | > +| restrict-to-be | 2 | > ++----------------+---+ > +| idle | 3 | > +----------------+---+ > > The numerical value that corresponds to each I/O priority class is as follows: > @@ -2074,7 +2076,7 @@ The algorithm to set the I/O priority class for a request is as follows: > - If I/O priority class policy is promote-to-rt, change the request I/O > priority class to IOPRIO_CLASS_RT and change the request I/O priority > level to 4. > -- If I/O priorityt class is not promote-to-rt, translate the I/O priority > +- If I/O priority class policy is not promote-to-rt, translate the I/O priority > class policy into a number, then change the request I/O priority class > into the maximum of the I/O priority class policy number and the numerical > I/O priority class.
