Hi,
I'm seeing nilfs_cleanerd using a lot of disk write bandwidth according
to iotop. It seems to be performing approximately equal amounts of reads
and writes when it is running. Reads I can understand, but why is it
writing so much in order to garbage collect? Should it not be just
trying to mark blocks as free? The disk I/O r/w symmetry implies that it
is trying to do something like defragment the file system. Is there a
way to configure this behaviour in some way? The main use-case I have
for nilfs is cheap flash media that suffers from terrible random-write
performance, but on such media this many writes are going to cause media
failure very quickly. What can be done about this?
Gordan
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