From: Greg KH <greg@kroah.com>
To: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [2.6.27.2] Unnamed entry appears in /sys/module/usbcore/parameters/ .
Date: Wed, 22 Oct 2008 22:11:13 -0700 [thread overview]
Message-ID: <20081023051113.GA7719@kroah.com> (raw)
In-Reply-To: <200810221951.JHF56206.JFQFMFSVtLOHOO@I-love.SAKURA.ne.jp>
On Wed, Oct 22, 2008 at 07:51:13PM +0900, Tetsuo Handa wrote:
> Hello.
>
> Below four results are obtained using config
> at http://I-love.SAKURA.ne.jp/tmp/config-2.6.27.2-2
> with CONFIG_USB=y and CONFIG_USB=m .
>
> ----------------------------------------
> Result of CONFIG_USB=y on Debian Sarge
>
> # ls -ail /sys/module/usbcore/parameters/
> total 0
> 200 drwxr-xr-x 2 root root 0 Oct 22 13:03
> 200 drwxr-xr-x 2 root root 0 Oct 22 13:03 .
> 199 drwxr-xr-x 4 root root 0 Oct 22 13:03 ..
> 201 -rw-r--r-- 1 root root 4096 Oct 22 13:03 autosuspend
> 203 -r--r--r-- 1 root root 4096 Oct 22 13:03 blinkenlights
> 204 -rw-r--r-- 1 root root 4096 Oct 22 13:03 old_scheme_first
> 205 -rw-r--r-- 1 root root 4096 Oct 22 13:03 use_both_schemes
> # cd /sys/module/usbcore/parameters/ ; strace ls -a
> (...snipped...)
> open(".", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
> fstat64(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
> fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
> getdents64(3, /* 7 entries */, 4096) = 224
> getdents64(3, /* 0 entries */, 4096) = 0
> close(3) = 0
> fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb809b000
> write(1, " . .. autosuspend blinkenli"..., 72 . .. autosuspend blinkenlights old_scheme_first use_both_schemes
> ) = 72
> munmap(0xb809b000, 4096) = 0
> exit_group(0) = ?
>
> ----------------------------------------
> Result of CONFIG_USB=m on Debian Sarge
>
> # ls -ail /sys/module/usbcore/parameters/
> total 0
> 3007 drwxr-xr-x 2 root root 0 Oct 22 13:10 .
> 3005 drwxr-xr-x 6 root root 0 Oct 22 13:10 ..
> 3008 -rw-r--r-- 1 root root 4096 Oct 22 13:10 autosuspend
> 3010 -r--r--r-- 1 root root 4096 Oct 22 13:10 blinkenlights
> 3009 -r--r--r-- 1 root root 4096 Oct 22 13:10 nousb
> 3011 -rw-r--r-- 1 root root 4096 Oct 22 13:10 old_scheme_first
> 3013 -rw-r--r-- 1 root root 4096 Oct 22 13:10 usbfs_snoop
> 3012 -rw-r--r-- 1 root root 4096 Oct 22 13:10 use_both_schemes
> # cd /sys/module/usbcore/parameters/ ; strace ls -a
> (...snipped...)
> open(".", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
> fstat64(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
> fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
> getdents64(3, /* 8 entries */, 4096) = 264
> getdents64(3, /* 0 entries */, 4096) = 0
> close(3) = 0
> fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb8081000
> write(1, ". .. autosuspend blinkenlight"..., 90. .. autosuspend blinkenlights nousb old_scheme_first usbfs_snoop use_both_schemes
> ) = 90
> munmap(0xb8081000, 4096) = 0
> exit_group(0) = ?
>
> ----------------------------------------
> Result of CONFIG_USB=y on CentOS 5.2
>
> # ls -ail /sys/module/usbcore/parameters/
> total 0
> 200 drwxr-xr-x 2 root root 0 Oct 22 13:13 .
> 199 drwxr-xr-x 4 root root 0 Oct 22 13:13 ..
> 201 -rw-r--r-- 1 root root 4096 Oct 22 13:13 autosuspend
> 204 -r--r--r-- 1 root root 4096 Oct 22 13:13 blinkenlights
> 203 -rw-r--r-- 1 root root 4096 Oct 22 13:13 old_scheme_first
> 205 -rw-r--r-- 1 root root 4096 Oct 22 13:13 usbfs_snoop
> 202 -rw-r--r-- 1 root root 4096 Oct 22 13:13 use_both_schemes
> # cd /sys/module/usbcore/parameters/ ; strace ls -a
> (...snipped...)
> open(".", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
> fstat64(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
> fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
> getdents64(3, /* 7 entries */, 4096) = 232
> getdents64(3, /* 0 entries */, 4096) = 0
> close(3) = 0
> fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7f94000
> write(1, ". .. autosuspend blinkenlight"..., 83. .. autosuspend blinkenlights old_scheme_first usbfs_snoop use_both_schemes
> ) = 83
> close(1) = 0
> munmap(0xb7f94000, 4096) = 0
> exit_group(0) = ?
>
> ----------------------------------------
> Result of CONFIG_USB=m on CentOS 5.2
>
> # ls -ail /sys/module/usbcore/parameters/
> total 0
> 2607 drwxr-xr-x 2 root root 0 Oct 22 13:19 .
> 2605 drwxr-xr-x 6 root root 0 Oct 22 13:19 ..
> 2609 -rw-r--r-- 1 root root 4096 Oct 22 13:19 autosuspend
> 2612 -r--r--r-- 1 root root 4096 Oct 22 13:19 blinkenlights
> 2608 -r--r--r-- 1 root root 4096 Oct 22 13:19 nousb
> 2611 -rw-r--r-- 1 root root 4096 Oct 22 13:19 old_scheme_first
> 2613 -rw-r--r-- 1 root root 4096 Oct 22 13:19 usbfs_snoop
> 2610 -rw-r--r-- 1 root root 4096 Oct 22 13:19 use_both_schemes
> # cd /sys/module/usbcore/parameters/ ; strace ls -a
> (...snipped...)
> open(".", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
> fstat64(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
> fcntl64(3, F_SETFD, FD_CLOEXEC) = 0
> getdents64(3, /* 8 entries */, 4096) = 264
> getdents64(3, /* 0 entries */, 4096) = 0
> close(3) = 0
> open("/proc/meminfo", O_RDONLY) = 3
> fstat64(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb805f000
> read(3, "MemTotal: 1018380 kB\nMemFre"..., 1024) = 806
> close(3) = 0
> munmap(0xb805f000, 4096) = 0
> fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb805f000
> write(1, ". .. autosuspend blinkenlight"..., 90. .. autosuspend blinkenlights nousb old_scheme_first usbfs_snoop use_both_schemes
> ) = 90
> close(1) = 0
> munmap(0xb805f000, 4096) = 0
> exit_group(0) = ?
>
> ----------------------------------------
>
> The difference between these results is that
> '205 -rw-r--r-- 1 root root 4096 Oct 22 13:13 usbfs_snoop' on CentOS 5.2 is
> reported as '200 drwxr-xr-x 2 root root 0 Oct 22 13:03' on Debian Sarge
> if CONFIG_USB=y.
>
> Debian Sarge: gcc (GCC) 3.3.5 (Debian 1:3.3.5-13)
> CentOS 5.2: gcc (GCC) 4.1.2 20071124 (Red Hat 4.1.2-42)
I really have no idea what is causing this, and can't seem to duplicate
this here at all.
Anyone else?
thanks,
greg k-h
next prev parent reply other threads:[~2008-10-23 5:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-21 8:38 [2.6.27.2] Unnamed entry appears in /sys/module/usbcore/parameters/ Tetsuo Handa
2008-10-21 17:00 ` Greg KH
2008-10-22 10:51 ` Tetsuo Handa
2008-10-23 5:11 ` Greg KH [this message]
2008-10-23 11:14 ` [2.6.27.2] Unnamed entry appears in/sys/module/usbcore/parameters/ Tetsuo Handa
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