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The title says it all.

Using Fedora for a small Samba and development server.

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up vote 9 down vote accepted

They're kernel threads.

[jbd2/%s] are used by JBD2 (the journal manager for ext4) to periodically flush journal commits and other changes to disk.

[kdmflush] is used by Device Mapper to process deferred work that it has queued up from other contexts where doing immediately so would be problematic.

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Thanks. Are the schedules of these flushes configurable? If so, how? –  Belmin Fernandez Dec 7 '10 at 12:23

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