> It "hang" my system and sometimes just the window from which I'm
> running the command "sync".
If you have lots of dirty pages and lots of memory, sync can take
several seconds and hold up any processes which do IO. This is
especially noticeable on systems with only a single spindle or a vfs
made of relatively few physical filesystems, but it also occur at the
high end as well and will be a problem until be get per device
queues.
-cw
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