tarfs: Add some sysctls to control readahead/behind
Needs ReviewPublic
Actions

Authored by markj on Thu, Oct 31, 3:12 PM.

Tags

None

Referenced Files

	Unknown Object (File)
	Thu, Nov 14, 7:15 PM

	Unknown Object (File)
	Thu, Nov 14, 3:42 PM

	Unknown Object (File)
	Fri, Nov 8, 7:31 AM

	Unknown Object (File)
	Fri, Nov 8, 1:38 AM

	Unknown Object (File)
	Thu, Nov 7, 2:54 PM

	Unknown Object (File)
	Thu, Nov 7, 12:53 PM

	Unknown Object (File)
	Thu, Nov 7, 11:39 AM

	Unknown Object (File)
	Mon, Nov 4, 11:25 PM

View All 9 Files

Subscribers

imp

Details

Reviewers

allanjude
des

Summary

We have a suspicion that overly eager readahead (and corresponding
decompression overhead) might be pessimizing boot times on some slow
arm64 systems. Readahead is definitely beneficial in general there, but
it's possible we're doing too much.

Add some sysctls to make experiementation easier.

Diff Detail

Repository

rG FreeBSD src repository

Lint

Lint Skipped

Unit

Tests Skipped

Build Status

Buildable 60280
Build 57164: arc lint + arc unit

Event Timeline

markj created this revision.Thu, Oct 31, 3:12 PM

Herald added a subscriber: imp. · View Herald TranscriptThu, Oct 31, 3:12 PM

markj requested review of this revision.Thu, Oct 31, 3:12 PM

Harbormaster completed remote builds in B60280: Diff 145737.Thu, Oct 31, 3:12 PM

Revision Contents
Changeset List

Path

Size

sys/

fs/

tarfs/

tarfs_vnops.c

12 lines

Diff 145737

View Options

sys/fs/tarfs/tarfs_vnops.c

tarfs: Add some sysctls to control readahead/behindNeeds ReviewPublicActions