Home
Reading
Searching
Subscribe
Sponsors
Statistics
Posting
Contact
Spam
Lists
Links
About
Hosting
Filtering
Features Download
Marketing
Archives
FAQ
Blog
 
Gmane
From: Wu Fengguang <fengguang.wu <at> intel.com>
Subject: [PATCH 0/5] [RFC] transfer ASYNC vmscan writeback IO to the flusher threads
Newsgroups: gmane.linux.kernel
Date: Thursday 29th July 2010 11:51:42 UTC (over 6 years ago)
Andrew,

It's possible to transfer ASYNC vmscan writeback IOs to the flusher
threads.
This simple patchset shows the basic idea. Since it's a big behavior
change,
there are inevitably lots of details to sort out. I don't know where it
will
go after tests and discussions, so the patches are intentionally kept
simple.

sync livelock avoidance (need more to be complete, but this is minimal
required for the last two patches)
	[PATCH 1/5] writeback: introduce wbc.for_sync to cover the two sync stages
	[PATCH 2/5] writeback: stop periodic/background work on seeing sync works
	[PATCH 3/5] writeback: prevent sync livelock with the sync_after timestamp

let the flusher threads do ASYNC writeback for pageout()
	[PATCH 4/5] writeback: introduce bdi_start_inode_writeback()
	[PATCH 5/5] vmscan: transfer async file writeback to the flusher

The last two patches are the meats, they depend on the first three patches
to
kick the background writeback work, so that the for_reclaim writeback can
be
serviced timely.

Comments are welcome!

Thanks,
Fengguang

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to [email protected]  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email:  email@kvack.org 
 
CD: 3ms