[OS-BUILD PATCH] redhat: configs: decrease CONFIG_PCP_BATCH_SCALE_MAX

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From: Rafael Aquini <raquini@xxxxxxxxxx>

redhat: configs: decrease CONFIG_PCP_BATCH_SCALE_MAX

In page allocator, PCP (Per-CPU pageset) is refilled and drained in batches.
The batch number is scaled automatically to improve page allocation/free
throughput. But a too large scale factor may end up hurting latency, like
observed on https://issues.redhat.com/browse/RHEL-59526.

We're bringing this down to 0 for RHEL, to provide a smooth linear scaling
factor as opposed to the default exponential scaling factor.

Signed-off-by: Rafael Aquini <raquini@xxxxxxxxxx>

diff --git a/redhat/configs/rhel/generic/CONFIG_PCP_BATCH_SCALE_MAX b/redhat/configs/rhel/generic/CONFIG_PCP_BATCH_SCALE_MAX
index blahblah..blahblah 100644
--- a/redhat/configs/rhel/generic/CONFIG_PCP_BATCH_SCALE_MAX
+++ b/redhat/configs/rhel/generic/CONFIG_PCP_BATCH_SCALE_MAX
@@ -1 +1 @@
-CONFIG_PCP_BATCH_SCALE_MAX=5
+CONFIG_PCP_BATCH_SCALE_MAX=0

--
https://gitlab.com/cki-project/kernel-ark/-/merge_requests/3440

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