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commit 6290b4cf92963f64ffa447cdaba099812c80fbfb
Author: Milos Nikic <[email protected]>
Date: Thu Feb 19 20:41:19 2026 -0800
trans: /dev/random remove atime/mtime updates to prevent metadata
write-amplification
Unlike /dev/null, /dev/random calls trivfs_set_atime and trivfs_set_mtime
with
every read/update which underneath calls file_utimens, spams and
completely ignores relatime.
If one wants to see this behavious "in action" one can just repeatedly call:
stat /dev/random
inside Hurd and every time one does that all three timestamps will come back
updated.
Worse if one instruments file_utimens one will see that just during the
login process we get hundreds of ATIME updates for /dev/random due to
background entropy.
With this patch, extraneous updates are removed and spam is drastically
reduced.
Message-ID: <[email protected]>
-----------------------------------------------------------------------
Summary of changes:
trans/random.c | 2 --
1 file changed, 2 deletions(-)
hooks/post-receive
--
Hurd
