[PATCH 0/7] mm: vmscan: fix kswapd writeback regression v2

[Johannes Weiner]

Hi Andrew,

here are some minor updates to the series. It's nothing functional,
just code comments and updates to the changelogs from the mailing list
discussions. Since we don't have a good delta system for changelogs
I'm resending the entire thing as a drop-in replacement for -mm.

These are the changes:

1. mm: vmscan: scan dirty pages even in laptop mode

   Mel tested the entire series, not just one patch. Move his test
   conclusions from 'mm: vmscan: remove old flusher wakeup from direct
   reclaim' into the series header in patch 1. Also, reflect the fact
   that these test results are indeed Mel's, not mine.

2. mm: vmscan: kick flushers when we encounter dirty pages on the LRU

   Mention the trade-off between flush-the-world/flush-the-scanwindow
   type wakeups in the changelog, as per the mailing list discussion.

3. mm: vmscan: move dirty pages out of the way until they're flushed

   Correct the last paragraph in the changelog. We're not activating
   dirty/writeback pages after they have rotated twice; they are being
   activated straight away to get them out of the reclaimer's face.
   This was a vestige from an earlier version of the patch.

4. mm: vmscan: move dirty pages out of the way until they're flushed fix

   Code comment fixlet to explain why we activate dirty/writeback pages.

Thanks!

 include/linux/mm_inline.h        |  7 ++++
 include/linux/mmzone.h           |  2 -
 include/linux/writeback.h        |  2 +-
 include/trace/events/writeback.h |  2 +-
 mm/swap.c                        |  9 +++--
 mm/vmscan.c                      | 77 ++++++++++++++++++--------------------
 6 files changed, 50 insertions(+), 49 deletions(-)