From 65f7c42bb4b1e3eb73c5302352b0fe655c8967ed815d3ae363f381b75169fb91 Mon Sep 17 00:00:00 2001
From: kira <kirill.shakirov@protonmail.com>
Date: Mon, 27 Jul 2026 16:33:05 +0200
Subject: [PATCH] Initial commit.

---
 .SRCINFO                   | 13 ++++++++++
 .gitignore                 | 36 ++++++++++++++++++++++++++
 60-kira-ioschedulers.rules | 14 ++++++++++
 66-kira-vfs.conf           | 53 ++++++++++++++++++++++++++++++++++++++
 PKGBUILD                   | 22 ++++++++++++++++
 README.md                  | 12 ++++++++-
 6 files changed, 149 insertions(+), 1 deletion(-)
 create mode 100644 .SRCINFO
 create mode 100644 .gitignore
 create mode 100644 60-kira-ioschedulers.rules
 create mode 100644 66-kira-vfs.conf
 create mode 100644 PKGBUILD

diff --git a/.SRCINFO b/.SRCINFO
new file mode 100644
index 0000000..4329aa1
--- /dev/null
+++ b/.SRCINFO
@@ -0,0 +1,13 @@
+pkgbase = kira-blk-settings
+	pkgdesc = Config to make VFS work more adequate, especially with USB Flash drives.
+	pkgver = 1.0.1
+	pkgrel = 1
+	url = https://dev.kira-linux.org/kira-linux-packages/kira-blk-settings
+	arch = any
+	license = GPL3
+	source = 66-kira-vfs.conf
+	source = 60-kira-ioschedulers.rules
+	sha384sums = 02c4f33615ebf14b66f877e01074fc85c19612b3a1e0cbdd9fdbcf45482729d0d8baec934f68af08858399f7af1b6bb5
+	sha384sums = 382da6f31676158f16e022dd0628c8f2d0c6e0db2bc37a7d52124beff9e920b804decfce6f717bb11b24bde9b5ba2c76
+
+pkgname = kira-blk-settings
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ce0f12d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,36 @@
+# ---> ArchLinuxPackages
+*.tar
+*.tar.*
+*.jar
+*.exe
+*.msi
+*.zip
+*.tgz
+*.log
+*.log.*
+*.sig
+
+pkg/
+src/
+
+
+# ---> Archives
+*.7z
+*.rar
+*.gz
+*.bzip
+*.bz2
+*.xz
+*.lzma
+*.cab
+
+# ---> systemd
+*.service
+*.socket
+*.timer
+
+# ---> snap
+*.snap
+*.service
+*.timer
+*.socket
diff --git a/60-kira-ioschedulers.rules b/60-kira-ioschedulers.rules
new file mode 100644
index 0000000..ca85eaf
--- /dev/null
+++ b/60-kira-ioschedulers.rules
@@ -0,0 +1,14 @@
+#
+# Main purpose of this config is to make work with flash drives and memory cards more adequate.
+# mq-deadline scheduler using IO latency as main measure, what makes it great for low IO/low concurrency
+# devices as usb flash drives, but also, it work really well for SATA SSDs.
+#
+
+# HDD
+ACTION=="add|change", KERNEL=="sd[a-z]*", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}="bfq"
+
+# SSD
+ACTION=="add|change", KERNEL=="sd[a-z]*|mmcblk[0-9]*", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="mq-deadline"
+
+# NVMe SSD
+ACTION=="add|change", KERNEL=="nvme[0-9]*", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="none"
diff --git a/66-kira-vfs.conf b/66-kira-vfs.conf
new file mode 100644
index 0000000..8ef5c81
--- /dev/null
+++ b/66-kira-vfs.conf
@@ -0,0 +1,53 @@
+#
+# Tell the kernel to use up to 10% of the RAM as cache for writes
+# On systems with lot of ram can be lowered even more.
+# Write cache is not free, and overuse of RAM for it
+# can cause low memory conditions simultaneously with IO clog.
+#
+
+# The infamous issues with writing to USB Flash drives partially caused by
+# write cache being too big.
+vm.dirty_ratio=10
+
+# Instruct kernel to use up to 5% of RAM before slowing down the process that's writing
+# Works in congestion with previous setting. And serving same purpose: protect system responsiveness.
+vm.dirty_background_ratio=5
+
+
+
+# ******** Options below is for information purposes and possible future enablement. **********
+
+
+# The value controls the tendency of the kernel to reclaim the memory which is used for caching of directory and inode objects (VFS cache).
+# Lowering it from the default value of 100 makes the kernel less inclined to reclaim VFS cache (do not set it to 0, this may produce out-of-memory conditions)
+#vm.vfs_cache_pressure=50
+
+# Contains, as a bytes of total available memory that contains free pages and reclaimable
+# pages, the number of pages at which a process which is generating disk writes will itself start
+# writing out dirty data.
+#vm.dirty_bytes = 268435456
+
+# Contains, as a bytes of total available memory that contains free pages and reclaimable
+# pages, the number of pages at which the background kernel flusher threads will start writing out
+# dirty data.
+#vm.dirty_background_bytes = 134217728
+
+# This tunable is used to define when dirty data is old enough to be eligible for writeout by the
+# kernel flusher threads.  It is expressed in 100'ths of a second.  Data which has been dirty
+# in-memory for longer than this interval will be written out next time a flusher thread wakes up
+# (Default is 3000).
+#vm.dirty_expire_centisecs = 3000
+
+# The kernel flusher threads will periodically wake up and write old data out to disk.  This
+# tunable expresses the interval between those wake-ups, in 100'ths of a second (Default is 500).
+# vm.dirty_writeback_centisecs = 1500
+
+# Increase writeback interval  for xfs
+# fs.xfs.xfssyncd_centisecs = 10000
+
+# Set the maximum watches on files
+#fs.inotify.max_user_watches = 524288
+
+# Set size of file handles and inode cache
+#fs.file-max = 2097152
+
diff --git a/PKGBUILD b/PKGBUILD
new file mode 100644
index 0000000..649e8d9
--- /dev/null
+++ b/PKGBUILD
@@ -0,0 +1,22 @@
+# Maintainer: Kira <[@kira](https://dev.kira-linux.org/kira)>
+
+pkgname=kira-blk-settings
+pkgver=1.0.1
+pkgrel=1
+pkgdesc="Config to make VFS work more adequate, especially with USB Flash drives."
+arch=('any')
+license=('GPL3')
+url="https://dev.kira-linux.org/kira-linux-packages/kira-blk-settings"
+
+source=(
+    '66-kira-vfs.conf'
+    '60-kira-ioschedulers.rules'
+)
+
+sha384sums=('02c4f33615ebf14b66f877e01074fc85c19612b3a1e0cbdd9fdbcf45482729d0d8baec934f68af08858399f7af1b6bb5'
+            '382da6f31676158f16e022dd0628c8f2d0c6e0db2bc37a7d52124beff9e920b804decfce6f717bb11b24bde9b5ba2c76')
+
+package() {
+    install -Dm0644 "$srcdir/66-kira-vfs.conf"   "$pkgdir/etc/sysctl.d/66-kira-vfs.conf"
+    install -Dm0644 "$srcdir/60-kira-ioschedulers.rules"   "$pkgdir/etc/udev/rules.d/60-kira-ioschedulers.rules"
+}
diff --git a/README.md b/README.md
index 43a83d0..f50e099 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,13 @@
 # kira-blk-settings
 
-Main purpose of this config is to make work of flash drives and memory cards more adequate.
\ No newline at end of file
+# Main purpose of this config is to make work of flash drives and memory cards more adequate.
+
+mq-deadline scheduler using IO latency as main measure, what makes it great for low IO/low concurrency devices as usb flash drives, but also, it work really well for SATA SSDs.
+
+Another part is to reduce vfs write cache.
+Write cache is not free, and overuse of RAM for it can cause low memory conditions simultaneously with IO clog.
+The infamous issues with writing to USB Flash drives partially caused by write cache being too big.
+
+Modern systems having lots of RAM (more than 8GB) what makes write cache with default settings grow inadequately large for physical storage actual write throughput. 
+
+The is some cases when big write cache is desired, like NAS storage or some write intensive workload that at the same time is not RAM intensive.