Does jffs2 garbage collection include erasing

[Kelly, Mike - ACDIN]

When one discusses garbage collection, does that include erasure of the
flash device?  Should manual activation of the garbage collection by sending
the SIGHUP signal to the jffs2 process also cause the process to start
erasing part of the flash device?

Thanks for any assistance you can give me -- a jffs2 newbie. 

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