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From: Thomas Liske <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: noflushd: not working with kernel software RAID support
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Date: Sun, 08 May 2005 23:38:56 +0200
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Package: noflushd
Version: 2.7.4-1
Severity: important
Tags: patch
Hi,
when running noflushd on a kernel with software RAID support it exits with a
BUG:
kelvin:~# noflushd -v -d -n 5 /dev/hda
Kernel talks oldstyle dev
Probing for valid blkdev at /dev/hda
Detected oldstyle dev at /dev/hda
Kernel talks oldstyle dev
Added entry for /dev/hda (3, 0)
Added disk /dev/hda, current timeout 300, state 2
Controlling pdflush daemon
Kernel talks linux 2.5-style stat
pdflush stopped
Check interval 5
Allocated stat entry for (1, 0)
[...]
Allocated stat entry for (3, 0)
BUG at disk_stat.c line 517: No entry for (9,0)
pdflush restarted with interval 500.
Speicherzugriffsfehler
kelvin:~#
The bug is triggered since the stat file reports the device md0 (in
update_io_25) and the
called alloc_entry_new function returns always NULL for virtual (MD and LVM)
devices, so
the BUG is triggered.
The following small patch adds a check for virtual block devices before
triggering a BUG:
=====================================[CUT
HERE]=====================================
diff -rNu noflushd-2.7.4/src/disk_stat.c noflushd-2.7.4.mdfix/src/disk_stat.c
--- noflushd-2.7.4/src/disk_stat.c 2004-08-08 17:06:29.000000000 +0200
+++ noflushd-2.7.4.mdfix/src/disk_stat.c 2005-05-08 23:30:20.248325040
+0200
@@ -400,7 +400,8 @@
di->newio.reads = rblk;
di->newio.writes = wblk;
} else {
- BUG("No entry for (%d,%d)", major, index);
+ if (major != MD_MAJOR && major != LVM_BLK_MAJOR)
+ BUG("No entry for (%d,%d)", major,
index);
}
}
@@ -514,7 +515,8 @@
di->newio.reads = rblk;
di->newio.writes = wblk;
} else {
- BUG("No entry for (%d,%d)", major, minor);
+ if (major != MD_MAJOR && major != LVM_BLK_MAJOR)
+ BUG("No entry for (%d,%d)", major, minor);
}
}
}
=====================================[CUT
HERE]=====================================
Thomas
-- System Information:
Debian Release: 3.1
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.11-fiasko-ide-pentium-iii
Locale: [EMAIL PROTECTED], [EMAIL PROTECTED] (charmap=ISO-8859-15)
Versions of packages noflushd depends on:
ii debconf [debconf-2.0] 1.4.30.13 Debian configuration management sy
ii ed 0.2-20 The classic unix line editor
ii libc6 2.3.2.ds1-21 GNU C Library: Shared libraries an
-- debconf information:
noflushd/expert: false
* noflushd/disks: /dev/hda
* noflushd/timeout: 5
noflushd/params:
---------------------------------------
Received: (at 308444-done) by bugs.debian.org; 17 May 2005 19:48:09 +0000
>From [EMAIL PROTECTED] Tue May 17 12:48:09 2005
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Date: Tue, 17 May 2005 21:47:58 +0200
From: Daniel Kobras <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: Re: Bug#308444: noflushd: Core dump
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On Tue, May 10, 2005 at 12:56:21PM +0300, Harri Haataja wrote:
> % apt-cache policy noflushd
> noflushd:
> Installed: 2.7.5-1
> Candidate: 2.7.5-1
> Version Table:
> *** 2.7.5-1 0
> 100 /var/lib/dpkg/status
> 2.7.4-1 0
> 600 http://ftp.fi.debian.org testing/main Packages
> 2.6.1-2 0
> 990 http://ftp.fi.debian.org stable/main Packages
>
> I copied the package over and it hasn't crashed after a moment now, at
> least.
Version 2.7.5-1 has made it to sarge as well in the meantime, so this
issue is now completely resolved. Closing the bug.
Regards,
Daniel.
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