Bug 386

Summary:	Kernel 2.4.17-r2 vs 2.4.17-r1 . r2 and SMB
Product:	Gentoo Linux	Reporter:	Geoff Rivell <grivell>
Component:	[OLD] Core system	Assignee:	Daniel Robbins (RETIRED) <drobbins>
Status:	RESOLVED FIXED
Severity:	major
Priority:	High
Version:	1.0 RC6 r14
Hardware:	x86
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Geoff Rivell 2002-01-28 09:32:17 UTC

Kernel 2.4.16-r1 works perfectly for me, but -r2 makes my mp3 playing on SMB skip.

It loads a huge chunk of the data at once (old method loaded about 280kbit/sec.. the size of the mp3).
Then it pauses several seconds (loads about 3800kbit)...  Then it gets another huge chunk.

This causes major skipping in Noatun.

Comment 1 Daniel Robbins (RETIRED) gentoo-dev

2002-01-28 13:14:30 UTC

ok, great.  thanks for the bug.  I think it's related to the new readahead code
doing its job too well.  Will forward to Andrew Morton to verify.

Comment 2 Edward Muller 2002-01-28 16:59:17 UTC

I have something similar just playing mp3's (using xmms) on a local fs. When I
just around from virtual desktop to virtual desktop the playing 'hiccups'/pauses
for about 1/4 (or less) of a second.This is using -r2 as well. I haven't tried
-r1 on this machine yet, but I'll do that tongiht.

Comment 3 Daniel Robbins (RETIRED) gentoo-dev

2002-01-28 17:50:26 UTC

It turns out that the readahead patch that was given to me by one of the
developers as "good stuff" is still in development.  I will be releasing a
2.4.17-r3 without this patch, since it is not really tuned right now and seems
to create some performance problems.