Bug 1493072

+++ This bug was initially created as a clone of Bug #1493069 +++

I'm cloning the RHEL-7 BZ, with the same questions for IBM, but in regards to Fedora and the future of Fedora/RHEL.

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Therefore, I would like to hereby ask IBM representatives, what should be correct default values on IBM's s390 (and s390x if needed) architectures for these settigs on Fedora?

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# Kernel sysctl configuration file
#
# For binary values, 0 is disabled, 1 is enabled.  See sysctl(8) and
# sysctl.conf(5) for more details.

# Controls the use of TCP syncookies
net.ipv4.tcp_syncookies = 1

# Do not spend as much process time too early to write out dirty pages
vm.dirty_ratio = 40

# Increase the average time a process runs continuously and also improve the
# cache utilization and server style workload throughput at minor latency cost
kernel.sched_min_granularity_ns = 10000000
kernel.sched_wakeup_granularity_ns = 15000000
kernel.sched_tunable_scaling = 0
kernel.sched_latency_ns = 80000000

# Controls the maximum shared segment size, in bytes
kernel.shmmax = 4294967295

# Controls the maximum number of shared memory segments, in pages
kernel.shmall = 268435456

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(https://github.com/fedora-sysv/initscripts/blob/master/sysctl.conf.s390)

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Would IBM be okay with completely removing all of these settings, and using default kernel values?

We would like to drop that configuration file in Fedora completely, and use the systemd/kernel default values. (We currently do this for other architectures using Fedora.)

Thank you in advance!

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@dhorak: Please, forward this request to IBM. Quick response from IBM is welcomed.