Bug#578131: [linux-2.6] Copying big files to pendrive is deadly slow

[Antonio Marcos López Alonso <amla@ipna.csic.es>]

Some facts:

- Still present in linux-image-2.6.32-5-amd64.

- Not present in linux-image-2.6.30-2-amd64. The transfer rate also drops 
after completing one third of the upload to the external device, but just to a 
"reasonable" 3.5 MB/s.

- It seems to be filesystem-independent (I formatted my pendrive with vfat, 
ntfs and ext4) and device-independent (tested other external storage devices).

- My buddy reports (on a different and more powerful Debian Squeeze amd64 box 
running 2.6.32-5) he is not experiencing anything unusual with transfer rates 
even using my own pendrive. So I guess there must be some combination of 
kernel and hardware issues. 

Regards,
Antonio