linux518/519: Add MGLRU patchset on a toggle and enable by default - https://lore.kernel.org/lkml/20220706220022.968789-1-yuzhao@google.com/

We've been offering the patchset in community patches for a while now with very good feedback

PKGBUILD

@@ -59,7 +59,7 @@ else
 fi
 pkgname=("${pkgbase}" "${pkgbase}-headers")
 pkgver="${_basekernel}"."${_sub}"
-pkgrel=264
+pkgrel=265
 pkgdesc='Linux-tkg'
 arch=('x86_64') # no i686 in here
 url="https://www.kernel.org/"
@@ -762,6 +762,7 @@ case $_basever in
         0009-glitched-ondemand-bmq.patch
         0009-glitched-bmq.patch
         0009-prjc_v5.18-r2.patch
+        0010-lru_5.18.patch
         #0012-linux-hardened.patch
         0012-misc-additions.patch
         # MM Dirty Soft for WRITE_WATCH support in Wine
@@ -786,6 +787,7 @@ case $_basever in
             '9fad4a40449e09522899955762c8928ae17f4cdaa16e01239fd12592e9d58177'
             'a557b342111849a5f920bbe1c129f3ff1fc1eff62c6bd6685e0972fc88e39911'
             'bb8a2daf56a513701895f67dc0e6cbde153481fcd0557906af45523d24aa9f76'
+            '55f633da855b9346bfcfc5204f109eca6d0d7532ad42dec131ea0d64a0d4fd08'
             '428517fbcb161a640b53782000c16f797c2ad27cf2758e7e56133fc62d2d113b'
             '1b656ad96004f27e9dc63d7f430b50d5c48510d6d4cd595a81c24b21adb70313'
             'b0319a7dff9c48b2f3e3d3597ee154bf92223149a633a8b7ce4026252db86da6')
@@ -812,6 +814,7 @@ case $_basever in
         0009-glitched-ondemand-bmq.patch
         0009-glitched-bmq.patch
         0009-prjc_v5.19-r0.patch
+        0010-lru_5.19.patch
         #0012-linux-hardened.patch
         0012-misc-additions.patch
         # MM Dirty Soft for WRITE_WATCH support in Wine
@@ -836,6 +839,7 @@ case $_basever in
             '9fad4a40449e09522899955762c8928ae17f4cdaa16e01239fd12592e9d58177'
             'a557b342111849a5f920bbe1c129f3ff1fc1eff62c6bd6685e0972fc88e39911'
             'b9822a7f912a46196facb9e70229b90357fbc7c7c1dfe23a407e1cb014add30d'
+            '970819d5a6eca65b9eeb7c459a8bd487600a10b2b02fed323f7456f483c7d5ce'
             '213ecf1ba59dc87ed1844c3473d575b85ffe3a567f86735e8c6239c92dbbb493'
             '1b656ad96004f27e9dc63d7f430b50d5c48510d6d4cd595a81c24b21adb70313'
             'b0319a7dff9c48b2f3e3d3597ee154bf92223149a633a8b7ce4026252db86da6')

customization.cfg

@@ -150,6 +150,11 @@ _acs_override=""
 # Set to "true" to add Bcache filesystem support. You'll have to install bcachefs-tools-git from AUR for utilities - https://bcachefs.org/ - If in doubt, set to "false"
 _bcachefs=""
 
+# Set to "true" to add multi-generational LRU framework support on kernel 5.18+ - https://lore.kernel.org/lkml/20220706220022.968789-1-yuzhao@google.com/
+# Older kernel versions might have a patch available in the community-patches repo
+# ! This option will be disabled when bcachefs is enabled for now !
+_mglru="true"
+
 # Set to "true" to enable support for fsync, an experimental replacement for esync found in Valve Proton 4.11+ - https://steamcommunity.com/games/221410/announcements/detail/2957094910196249305
 # Can be enabled alongside _futex_waitv on 5.13+ to use it as a fallback for older Proton builds
 _fsync="true"

linux-tkg-config/prepare

@@ -1181,6 +1181,24 @@ _tkg_srcprep() {
     fi
   fi
 
+  # MGLRU
+  tkgpatch="$srcdir/0010-lru_${_basekernel}.patch"
+  if [ -e "$tkgpatch" ] && [ "$_bcachefs" != "true" ] && [[ ! "$CONDITION8" =~ [yY] ]]; then
+    if [ -z "$_mglru" ]; then
+       plain ""
+       plain "Add multi-generational LRU framework support? "
+       plain "https://lore.kernel.org/lkml/20220706220022.968789-1-yuzhao@google.com/"
+       read -rp "`echo $'    > N/y : '`" CONDITION_mglru;
+    fi
+    if [[ "$CONDITION_mglru" =~ [yY] ]] || [ "$_mglru" = "true" ]; then
+       _msg="Patching MGLRU in"
+       _tkg_patcher
+
+       _enable "LRU_GEN" "LRU_GEN_ENABLED"
+       _disable "LRU_GEN_STATS"
+    fi
+  fi
+
   # futex_waitv support
   tkgpatch="$srcdir/0007-v${_basekernel}-futex_waitv.patch"
   if [ -e "$tkgpatch" ]; then