http://bugzilla.kernel.org/show_bug.cgi?id=8545
Summary: "cat /proc/acpi/debug_level" truncated
Kernel Version: 2.6.22-rc3
Status: NEW
Severity: normal
Owner: [EMAIL PROTECTED]
Submitter: [EMAIL PROTECTED]
Most recent kernel where this bug did *NOT* occur:
Distribution: Debian
Hardware Environment: Clevo model D4J, product code D410J
Software Environment:
Problem Description:
The "cat /proc/acpi/debug_level" command result in a truncated output when
executing from an xterm window. When the same command is redirected to file, the
output is not truncated.
The strace analysis shows that the "cat" command executes a system read with a
buffer size of 1024, then repeats with a second read() to fetch the remaining
part of the output. The remaining part is not returned by read() in this case.
If the output of "cat" is redirected to file, it will use a buffer sized 4096
bytes, so the full output is catched with one read() call.
Steps to reproduce:
in xterm window: cat /proc/acpi/debug_level
cat /proc/acpi/debug_level >to_file.txt
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