[Bugme-new] [Bug 10966] New: [REGRESSION] kernel freezes writing value to sysfs

[bugme-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=10966

           Summary: [REGRESSION] kernel freezes writing value to sysfs
           Product: Platform Specific/Hardware
           Version: 2.5
     KernelVersion: 2.6.25.6
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: i386
        AssignedTo: platform_i386 at kernel-bugs.osdl.org
        ReportedBy: cijoml at volny.cz


Latest working kernel version: 2.6.22?
Earliest failing kernel version: unk
Distribution: Debian testing
Hardware Environment: HP Compaq 6910p, Core2Duo
Software Environment: Debian testing, vanilla 2.6.25.6, i386 kernel
Problem Description:

kernel freezes doing 

echo 0 > /sys/devices/system/cpu/cpu1/online
Everythink is ok, I see only 1 cpu in /proc/cpuinfo
echo 1 > /sys/devices/system/cpu/cpu1/online
Immeditial freeze!

Steps to reproduce:
Write commands


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