This is a backport of the series that fixes the way deadline bandwidth
restoration is done which is causing noticeable delay on resume path. It also
converts the cpuset lock back into a mutex which some users on Android too.
I lack the details but AFAIU the read/write semaphore was slower on high
contention.

Compile tested against some randconfig for different archs. Only boot tested on
x86 qemu.

Based on v6.4.11

Original series:

	https://lore.kernel.org/lkml/20230508075854.17215-1-juri.lelli@redhat.com/

Thanks!

--
Qais Yousef

Dietmar Eggemann (2):
  sched/deadline: Create DL BW alloc, free & check overflow interface
  cgroup/cpuset: Free DL BW in case can_attach() fails

Juri Lelli (4):
  cgroup/cpuset: Rename functions dealing with DEADLINE accounting
  sched/cpuset: Bring back cpuset_mutex
  sched/cpuset: Keep track of SCHED_DEADLINE task in cpusets
  cgroup/cpuset: Iterate only if DEADLINE tasks are present

 include/linux/cpuset.h  |  12 +-
 include/linux/sched.h   |   4 +-
 kernel/cgroup/cgroup.c  |   4 +
 kernel/cgroup/cpuset.c  | 244 ++++++++++++++++++++++++++--------------
 kernel/sched/core.c     |  41 +++----
 kernel/sched/deadline.c |  67 ++++++++---
 kernel/sched/sched.h    |   2 +-
 7 files changed, 246 insertions(+), 128 deletions(-)

-- 
2.34.1

On Mon, Aug 21, 2023 at 11:19:50PM +0100, Qais Yousef wrote:
> This is a backport of the series that fixes the way deadline bandwidth
> restoration is done which is causing noticeable delay on resume path. It also
> converts the cpuset lock back into a mutex which some users on Android too.
> I lack the details but AFAIU the read/write semaphore was slower on high
> contention.
> 
> Compile tested against some randconfig for different archs. Only boot tested on
> x86 qemu.
> 
> Based on v6.4.11
> 
> Original series:
> 
> 	https://lore.kernel.org/lkml/20230508075854.17215-1-juri.lelli@redhat.com/
> 
> Thanks!

All backports now queued up, thanks for doing this work!

greg k-h

On 08/27/23 10:34, Greg KH wrote:
> On Mon, Aug 21, 2023 at 11:19:50PM +0100, Qais Yousef wrote:
> > This is a backport of the series that fixes the way deadline bandwidth
> > restoration is done which is causing noticeable delay on resume path. It also
> > converts the cpuset lock back into a mutex which some users on Android too.
> > I lack the details but AFAIU the read/write semaphore was slower on high
> > contention.
> > 
> > Compile tested against some randconfig for different archs. Only boot tested on
> > x86 qemu.
> > 
> > Based on v6.4.11
> > 
> > Original series:
> > 
> > 	https://lore.kernel.org/lkml/20230508075854.17215-1-juri.lelli@redhat.com/
> > 
> > Thanks!
> 
> All backports now queued up, thanks for doing this work!

And thanks for your patience!

--
Qais Yousef