From: Maxim Patlasov <mpatlasov@parallels.com>
To: miklos@szeredi.hu
Cc: dev@parallels.com, xemul@parallels.com,
fuse-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org,
jbottomley@parallels.com, linux-mm@kvack.org,
viro@zeniv.linux.org.uk, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 14/14] mm: Account for WRITEBACK_TEMP in balance_dirty_pages
Date: Wed, 21 Nov 2012 16:01:28 +0400 [thread overview]
Message-ID: <20121121115314.20471.52148.stgit@maximpc.sw.ru> (raw)
In-Reply-To: <20121116171039.3196.92186.stgit@maximpc.sw.ru>
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);
next prev parent reply other threads:[~2012-11-21 12:02 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-16 17:04 [PATCH v2 00/14] fuse: An attempt to implement a write-back cache policy Maxim Patlasov
2012-11-16 17:05 ` [PATCH 01/14] fuse: Linking file to inode helper Maxim Patlasov
2012-11-16 17:05 ` [PATCH 02/14] fuse: Getting file for writeback helper Maxim Patlasov
2012-11-16 17:06 ` [PATCH 03/14] fuse: Prepare to handle short reads Maxim Patlasov
2012-11-16 17:07 ` [PATCH 04/14] fuse: Prepare to handle multiple pages in writeback Maxim Patlasov
2012-11-16 17:07 ` [PATCH 05/14] fuse: Connection bit for enabling writeback Maxim Patlasov
2012-11-16 17:07 ` [PATCH 06/14] fuse: Trust kernel i_size only Maxim Patlasov
2012-12-05 16:39 ` [PATCH] fuse: Trust kernel i_size only - v2 Maxim Patlasov
2012-12-05 16:40 ` [PATCH] fuse: Implement writepages and write_begin/write_end callbacks " Maxim Patlasov
2012-11-16 17:09 ` [PATCH 07/14] fuse: Update i_mtime on buffered writes Maxim Patlasov
2012-11-16 17:09 ` [PATCH 08/14] fuse: Flush files on wb close Maxim Patlasov
2012-11-16 17:09 ` [PATCH 09/14] fuse: Implement writepages and write_begin/write_end callbacks Maxim Patlasov
2012-11-16 17:09 ` [PATCH 10/14] fuse: fuse_writepage_locked() should wait on writeback Maxim Patlasov
2012-11-16 17:10 ` [PATCH 11/14] fuse: fuse_flush() " Maxim Patlasov
2012-11-16 17:10 ` [PATCH 12/14] fuse: Fix O_DIRECT operations vs cached writeback misorder Maxim Patlasov
2012-12-05 16:43 ` [PATCH] fuse: Fix O_DIRECT operations vs cached writeback misorder - v2 Maxim Patlasov
2012-11-16 17:10 ` [PATCH 13/14] fuse: Turn writeback cache on Maxim Patlasov
2012-11-16 17:10 ` [PATCH 14/14] mm: Account for WRITEBACK_TEMP in balance_dirty_pages Maxim Patlasov
2012-11-21 12:01 ` Maxim Patlasov [this message]
2012-11-22 13:27 ` Jaegeuk Hanse
2012-11-22 13:56 ` Maxim V. Patlasov
2012-11-27 1:04 ` [PATCH v2 00/14] fuse: An attempt to implement a write-back cache policy Feng Shuo
2012-11-27 7:56 ` Maxim V. Patlasov
2012-12-12 14:53 ` Maxim V. Patlasov
2013-01-15 15:20 ` Maxim V. Patlasov
2013-01-25 10:21 ` Miklos Szeredi
2013-01-25 12:50 ` Maxim V. Patlasov
2013-01-25 18:20 [PATCH v3 " Maxim V. Patlasov
2013-01-25 18:28 ` [PATCH 14/14] mm: Account for WRITEBACK_TEMP in balance_dirty_pages Maxim V. Patlasov
2013-04-01 10:40 [PATCH v4 00/14] fuse: An attempt to implement a write-back cache policy Maxim V. Patlasov
2013-04-01 10:42 ` [PATCH 14/14] mm: Account for WRITEBACK_TEMP in balance_dirty_pages Maxim V. Patlasov
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