ppp/slip stall because pdflush

[Lorenzo Delana]

I connect to internet with ppp/slip then I initiate a download for 
example 2Mb of file.
Then during the download I start a copy of a file, for example, 100MB 
between my disk
partitions, so the connection bandwidth go to 0b/s.

I tried to renice pppd to -20 but pdflush, reiserfs and other kernel 
daemon they have prevalence
over the ppp.

What is the real problem/solution?


Thanks in advice,
lorenzo
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