Messages in this thread Patch in this message | | | Subject | Re: [PATCH 14/14] mm: Account for WRITEBACK_TEMP in balance_dirty_pages | From | Maxim Patlasov <> | Date | Wed, 21 Nov 2012 16:01:28 +0400 |
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Added linux-mm@ to cc:. The patch can stand on it's own.
> Make balance_dirty_pages start the throttling when the WRITEBACK_TEMP > counter is high enough. This prevents us from having too many dirty > pages on fuse, thus giving the userspace part of it a chance to write > stuff properly. > > Note, that the existing balance logic is per-bdi, i.e. if the fuse > user task gets stuck in the function this means, that it either > writes to the mountpoint it serves (but it can deadlock even without > the writeback) or it is writing to some _other_ dirty bdi and in the > latter case someone else will free the memory for it.
Signed-off-by: Maxim V. Patlasov <MPatlasov@parallels.com> Signed-off-by: Pavel Emelyanov <xemul@openvz.org> --- mm/page-writeback.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 830893b..499a606 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1220,7 +1220,8 @@ static void balance_dirty_pages(struct address_space *mapping, */ nr_reclaimable = global_page_state(NR_FILE_DIRTY) + global_page_state(NR_UNSTABLE_NFS); - nr_dirty = nr_reclaimable + global_page_state(NR_WRITEBACK); + nr_dirty = nr_reclaimable + global_page_state(NR_WRITEBACK) + + global_page_state(NR_WRITEBACK_TEMP); global_dirty_limits(&background_thresh, &dirty_thresh);
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