From d0dbd3fa3e14db9c972a50562dc915138657dde0 Mon Sep 17 00:00:00 2001 From: Grumpy Coder Date: Sun, 23 Jul 2023 06:27:26 +0000 Subject: [PATCH] Update 'README.md' --- README.md | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/README.md b/README.md index 0a29de5..cf060a9 100644 --- a/README.md +++ b/README.md @@ -27,6 +27,12 @@ The final rule # rule to disable write cache for usb storage # requires hdparm to be installed ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/hdparm -W 0 /dev/%k" +# +# the following rules is introduced with kernel 6.2 +# https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-strict-limit +# https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-ratio +# https://docs.kernel.org/admin-guide/abi-testing.html#abi-sys-class-bdi-bdi-max-bytes +ACTION=="add|change", KERNEL=="sd[a-z]", ENV{ID_USB_TYPE}=="disk", RUN+="/usr/bin/echo 1 > /sys/block/%k/bdi/strict_limit", RUN+="/usr/bin/echo 50 > /sys/block/%k/bdi/max_ratio", RUN+="/usr/bin/echo 16777216 > /sys/block/%k/bdi/max_bytes" ``` The rule activates on