From 4de60d28ca1a034d9713ed0fc84ae6f93b0ffcc4 Mon Sep 17 00:00:00 2001
From: Ludovic Pouzenc <ludovic@pouzenc.fr>
Date: Wed, 25 Jan 2023 13:29:29 +0100
Subject: Initial import

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 README.md | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 README.md

(limited to 'README.md')

diff --git a/README.md b/README.md
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+# dontneed: tell linux you don't need some files in RAM cache
+
+Maybe used to prevent swapping about files you write but don't read, like somedump.sql.gz on somelog.1.gz.
+
+    Usage: ./dontneed <path>...
+     Calls posix_fadvise(fd, 0, 0, POSIX_FADV_DONTNEED) on each <path>
+    
+     Tip: you may find all cached files from rootfs with the costly one-liner:
+     # find / -mount -type f -print0 | xargs -r0 fincore | grep -vE '^ *0B' | sort -hr | uniq | less
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