From: Stefan Roesch <[email protected]>
To: <[email protected]>, <[email protected]>,
<[email protected]>, <[email protected]>,
<[email protected]>
Cc: <[email protected]>, <[email protected]>, <[email protected]>, <[email protected]>
Subject: [RFC PATCH v4 02/17] mm: Move updates of dirty_exceeded into one place
Date: Fri, 20 May 2022 11:36:31 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
From: Jan Kara <[email protected]>
Transition of wb->dirty_exceeded from 0 to 1 happens before we go to
sleep in balance_dirty_pages() while transition from 1 to 0 happens when
exiting from balance_dirty_pages(), possibly based on old values. This
does not make a lot of sense since wb->dirty_exceeded should simply
reflect whether wb is over dirty limit and so we should ratelimit
entering to balance_dirty_pages() less. Move the two updates together.
Signed-off-by: Jan Kara <[email protected]>
Signed-off-by: Stefan Roesch <[email protected]>
---
mm/page-writeback.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 8e5e003f0093..89dcc7d8395a 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1720,8 +1720,8 @@ static void balance_dirty_pages(struct bdi_writeback *wb,
sdtc = mdtc;
}
- if (dirty_exceeded && !wb->dirty_exceeded)
- wb->dirty_exceeded = 1;
+ if (dirty_exceeded != wb->dirty_exceeded)
+ wb->dirty_exceeded = dirty_exceeded;
if (time_is_before_jiffies(READ_ONCE(wb->bw_time_stamp) +
BANDWIDTH_INTERVAL))
@@ -1825,9 +1825,6 @@ static void balance_dirty_pages(struct bdi_writeback *wb,
if (fatal_signal_pending(current))
break;
}
-
- if (!dirty_exceeded && wb->dirty_exceeded)
- wb->dirty_exceeded = 0;
}
static DEFINE_PER_CPU(int, bdp_ratelimits);
--
2.30.2
next prev parent reply other threads:[~2022-05-20 18:37 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-20 18:36 [RFC PATCH v4 00/17] io-uring/xfs: support async buffered writes Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 01/17] mm: Move starting of background writeback into the main balancing loop Stefan Roesch
2022-05-20 18:36 ` Stefan Roesch [this message]
2022-05-20 18:36 ` [RFC PATCH v4 03/17] mm: Prepare balance_dirty_pages() for async buffered writes Stefan Roesch
2022-05-22 7:17 ` Christoph Hellwig
2022-05-25 21:30 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 04/17] mm: Add balance_dirty_pages_ratelimited_flags() function Stefan Roesch
2022-05-23 10:40 ` Jan Kara
2022-05-20 18:36 ` [RFC PATCH v4 05/17] iomap: Add gfp parameter to iomap_page_create() Stefan Roesch
2022-05-22 7:21 ` Christoph Hellwig
2022-05-25 21:29 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 06/17] iomap: Add async buffered write support Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 07/17] iomap: Use balance_dirty_pages_ratelimited_flags in iomap_write_iter Stefan Roesch
2022-05-22 7:19 ` Christoph Hellwig
2022-05-25 21:32 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 08/17] fs: Add check for async buffered writes to generic_write_checks Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 09/17] fs: Split off remove_needs_file_privs() __remove_file_privs() Stefan Roesch
2022-05-22 7:32 ` Christoph Hellwig
2022-05-25 21:34 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 10/17] fs: Split off file_needs_update_time and __file_update_time Stefan Roesch
2022-05-22 7:29 ` Christoph Hellwig
2022-05-25 22:32 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 11/17] fs: Add async write file modification handling Stefan Roesch
2022-05-22 7:24 ` Christoph Hellwig
2022-05-25 21:39 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 12/17] fs: Optimization for concurrent file time updates Stefan Roesch
2022-05-23 10:51 ` Jan Kara
2022-05-25 21:46 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 13/17] io_uring: Add support for async buffered writes Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 14/17] io_uring: Add tracepoint for short writes Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 15/17] xfs: Add iomap async buffered write support Stefan Roesch
2022-05-22 7:33 ` Christoph Hellwig
2022-05-25 21:40 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 16/17] xfs: Add " Stefan Roesch
2022-05-22 7:34 ` Christoph Hellwig
2022-05-25 21:41 ` Stefan Roesch
2022-05-22 15:35 ` Darrick J. Wong
2022-05-25 21:44 ` Stefan Roesch
2022-05-20 18:36 ` [RFC PATCH v4 17/17] xfs: Enable " Stefan Roesch
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