[Pkg-alsa-devel] Bug#274456: marked as done (alsa-utils: please make alsactl store/restore more devfs-friendly)
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From: Ryan Underwood <nemesis@dbz.icequake.net>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: alsa-utils: please make alsactl store/restore more devfs-friendly
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Date: Fri, 01 Oct 2004 16:55:28 -0500
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Package: alsa-utils
Version: 1.0.4-1
Severity: minor
alsactl restore takes a long time on a slow devfs machine. The problem
is the following:
open("/dev/snd/controlC1", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/dev/aloadC1", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/dev/snd/controlC2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/dev/aloadC2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/dev/snd/controlC3", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/dev/aloadC3", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/dev/snd/controlC4", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/dev/aloadC4", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/dev/snd/controlC5", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/dev/aloadC5", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/dev/snd/controlC6", O_RDONLY) = -1 ENOENT (No such file or directory)
.....
Each of these attempts causes about a 1 second delay on my machine
(P120). I presume this is due to devfs trying to modprobe stuff in the
background.
A more efficient method would probably be to opendir() and scan through
the directory entries to check for existence.
-- System Information:
Debian Release: testing/unstable
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.4.25
Locale: LANG=en_US, LC_CTYPE=en_US
Versions of packages alsa-utils depends on:
ii alsa-base 1.0.4-3 ALSA sound driver common files
ii dialog 0.9b-20040421-1 Displays user-friendly dialog boxe
ii libasound2 1.0.5-1 Advanced Linux Sound Architecture
ii libc6 2.3.2.ds1-12 GNU C Library: Shared libraries an
ii libncurses5 5.4-4 Shared libraries for terminal hand
ii module-init-tools 3.0-pre10-4 tools for managing Linux kernel mo
ii modutils 2.4.26-1 Linux module utilities
ii pciutils 1:2.1.11-8 Linux PCI Utilities (for 2.*.* ker
ii whiptail 0.51.6-3 Displays user-friendly dialog boxe
-- no debconf information
---------------------------------------
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>From jdthood@aglu.demon.nl Tue Jul 05 08:08:55 2005
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Message-ID: <42CAA267.90300@aglu.demon.nl>
Date: Tue, 05 Jul 2005 17:08:23 +0200
From: Thomas Hood <jdthood@aglu.demon.nl>
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devfs is starting to be rather ancient history now.
--
Thomas Hood