From 513d4e4bdbbca75e46bab9b751e0c64b014195e1 Mon Sep 17 00:00:00 2001
From: Aseem Athale <athaleaseem@gmail.com>
Date: Wed, 17 Feb 2021 14:22:20 +0530
Subject: core/linux-lts: do not use zstd in ultra mode, disable bpf preload

---
 core/linux-lts/PKGBUILD            |  7 ++++++-
 core/linux-lts/config              |  2 +-
 core/linux-lts/no-ultra-zstd.patch | 12 ++++++++++++
 3 files changed, 19 insertions(+), 2 deletions(-)
 create mode 100644 core/linux-lts/no-ultra-zstd.patch

(limited to 'core/linux-lts')

diff --git a/core/linux-lts/PKGBUILD b/core/linux-lts/PKGBUILD
index c43e3041..ffe999a4 100644
--- a/core/linux-lts/PKGBUILD
+++ b/core/linux-lts/PKGBUILD
@@ -3,7 +3,7 @@
 # fail if upstream's .config changes
 for ((i=0; i<${#sha256sums[@]}; i++)); do
   if [ "${sha256sums[${i}]}" = '14d52a4f598bdbf752546c4bab4dd096173db1f958df7dde97d17bb347b7073f' ]; then
-    sha256sums[${i}]='4135bd56391d641aef00e4b52111c944f6ab816b0bc99f90dd0cb421967d516c'
+    sha256sums[${i}]='e92944269abb4310bd44c98a1008c95e5894a223caa3a73336fca218b513b66d'
   fi
 done
 
@@ -14,3 +14,8 @@ eval "$(
       \,arch/x86/Makefile,a install -Dt "$builddir/arch/x86" -m644 arch/x86/Makefile_32.cpu
     '
 )"
+
+# avoid using zstd compression in ultra mode (exhausts virtual memory)
+source+=('no-ultra-zstd.patch')
+sha256sums+=('3997ce6033fdf950a9960f1db720b38c47b1a2e06ab75fc6712c154f596e7c47')
+# upstream prepare() does already do the *.patch patching
diff --git a/core/linux-lts/config b/core/linux-lts/config
index 8ebcc8de..0a8ce209 100644
--- a/core/linux-lts/config
+++ b/core/linux-lts/config
@@ -241,7 +241,7 @@ CONFIG_BPF_SYSCALL=y
 CONFIG_BPF_JIT_ALWAYS_ON=y
 CONFIG_BPF_JIT_DEFAULT_ON=y
 CONFIG_USERMODE_DRIVER=y
-CONFIG_BPF_PRELOAD=y
+# CONFIG_BPF_PRELOAD is not set
 CONFIG_BPF_PRELOAD_UMD=m
 CONFIG_USERFAULTFD=y
 CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y
diff --git a/core/linux-lts/no-ultra-zstd.patch b/core/linux-lts/no-ultra-zstd.patch
new file mode 100644
index 00000000..e3b133d5
--- /dev/null
+++ b/core/linux-lts/no-ultra-zstd.patch
@@ -0,0 +1,12 @@
+diff -rauN a/scripts/Makefile.lib b/scripts/Makefile.lib
+--- a/scripts/Makefile.lib	2020-11-11 06:45:51.375133819 +0100
++++ b/scripts/Makefile.lib	2020-11-11 06:46:12.058448322 +0100
+@@ -445,7 +445,7 @@
+       cmd_zstd = { cat $(real-prereqs) | $(ZSTD) -19; $(size_append); } > $@
+ 
+ quiet_cmd_zstd22 = ZSTD22  $@
+-      cmd_zstd22 = { cat $(real-prereqs) | $(ZSTD) -22 --ultra; $(size_append); } > $@
++      cmd_zstd22 = { cat $(real-prereqs) | $(ZSTD) -19; $(size_append); } > $@
+ 
+ # ASM offsets
+ # ---------------------------------------------------------------------------
-- 
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