[Bug]: armbian-ramlog severely slowed down by nocache tool

[alex3d]

What happened?

Currently armbian-ramlog uses nocache to bypass pagecache, but this severely slows down boot process.
It seems that even the nocache official page claims this tools should not be used for anything except learning purposes.
If there is no rationale to leave it in Armbian, I'll send a PR to remove nocache.

How to reproduce?

build/packages/bsp/common/usr/lib/armbian/armbian-ramlog

Lines 51 to 56 in 1f58276

	${NoCache} rsync -aXWv \
	--exclude "lost+found" --exclude armbian-ramlog.log \
	--exclude 'journal*' --one-file-system \
	--links \
	${XTRA_RSYNC_TO[@]+"${XTRA_RSYNC_TO[@]}"} \
	$RAM_LOG/ $HDD_LOG/ 2>&1 | $LOG_OUTPUT

root@rk:~# time rsync -aXWv --delete --exclude "lost+found" --exclude armbian-ramlog.log --exclude '*.gz' --exclude '*.xz' --exclude='*.[0-9]' --links --exclude 'journal*' --one-file-system /var/log.hdd/ /var/log/tmp/ >/dev/null

real    0m0.187s
user    0m0.060s
sys     0m0.148s
root@rk:~# time nocache rsync -aXWv --delete --exclude "lost+found" --exclude armbian-ramlog.log --exclude '*.gz' --exclude '*.xz' --exclude='*.[0-9]' --links --exclude 'journal*' --one-file-system /var/log.hdd/ /var/log/tmp/ >/dev/null

real    0m6.858s
user    0m2.300s
sys     0m4.567s

Branch

main (main development branch)

On which host OS are you running the build script and observing this problem?

Ubuntu 24.04 Noble

Are you building on Windows WSL2?

• Yes, my Ubuntu/Debian/OtherOS is running on WSL2

Relevant log URL

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[github-actions]

Jira ticket: AR-2403