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Message-Id: <201001031031.o03AVraM027501@demeter.kernel.org> Date: Sun, 3 Jan 2010 10:31:53 GMT From: bugzilla-daemon@...zilla.kernel.org To: linux-ext4@...r.kernel.org Subject: [Bug 14972] [regression] msync() call on ext4 causes disk thrashing http://bugzilla.kernel.org/show_bug.cgi?id=14972 --- Comment #7 from Artem S. Tashkinov <t.artem@...lcity.com> 2010-01-03 10:31:49 --- Created an attachment (id=24417) --> (http://bugzilla.kernel.org/attachment.cgi?id=24417) trace pipe output blktrace produces zero output, so I'm attaching trace pipe output while running this test application. I tried using blktrace this way: # mount -t debugfs nul /sys/kernel/debug # echo blk > /sys/kernel/debug/tracing/current_tracer # echo 1 > /sys/block/sda/sda3/trace/enable # blktrace /dev/sda3 BLKTRACESETUP(2) /dev/sda3 failed: 16/Device or resource busy Thread 0 failed open /sys/kernel/debug/block/(null)/trace0: 2/No such file or directory Thread 1 failed open /sys/kernel/debug/block/(null)/trace1: 2/No such file or directory FAILED to start thread on CPU 0: 1/Operation not permitted FAILED to start thread on CPU 1: 1/Operation not permitted -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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