Re: 2.6.6-rc{1,2} bad VM/NFS interaction in case of dirty page writeback

[Shantanu Goel]

Andrew/Trond,

Any consensus as to what the right approach is here?

One cheap though perhaps hack'ish solution would be to
introduce yet another special error code like
WRITEPAGE_ACTIVATE which instead of moving the page to
the head of the active list instead moves it to the
head of the inactive list.  In this case, would it
also make sense for balance_pgdat() to
wakeup_bdflush() before blk_congestion_wait()? 
Otherwise, kswapd() would keep looping over the same
pages at least until kupdate kicks in or a process
stalls in try_to_free_pages()?

Thanks,
Shantanu



	
		
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