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From: Stefan Roesch <[email protected]>
To: <[email protected]>, <[email protected]>,
	<[email protected]>, <[email protected]>
Cc: <[email protected]>
Subject: [PATCH v1 11/14] sched: add new fields to task_struct
Date: Mon, 14 Feb 2022 09:44:00 -0800	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

Add two new fields to the task_struct to support async
write throttling.

  - One field to store how long writes are throttled: bdp_pause
  - The other field to store the number of dirtied pages:
    bdp_nr_dirtied_pause

Signed-off-by: Stefan Roesch <[email protected]>
---
 include/linux/sched.h | 3 +++
 kernel/fork.c         | 1 +
 2 files changed, 4 insertions(+)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 75ba8aa60248..97146b7539c5 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1324,6 +1324,9 @@ struct task_struct {
 	/* Start of a write-and-pause period: */
 	unsigned long			dirty_paused_when;
 
+	unsigned long			bdp_pause;
+	int				bdp_nr_dirtied_pause;
+
 #ifdef CONFIG_LATENCYTOP
 	int				latency_record_count;
 	struct latency_record		latency_record[LT_SAVECOUNT];
diff --git a/kernel/fork.c b/kernel/fork.c
index d75a528f7b21..d34c9c00baea 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2246,6 +2246,7 @@ static __latent_entropy struct task_struct *copy_process(
 	p->nr_dirtied = 0;
 	p->nr_dirtied_pause = 128 >> (PAGE_SHIFT - 10);
 	p->dirty_paused_when = 0;
+	p->bdp_nr_dirtied_pause = -1;
 
 	p->pdeath_signal = 0;
 	INIT_LIST_HEAD(&p->thread_group);
-- 
2.30.2


  parent reply	other threads:[~2022-02-14 17:44 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-14 17:43 [PATCH v1 00/14] Support sync buffered writes for io-uring Stefan Roesch
2022-02-14 17:43 ` [PATCH v1 01/14] fs: Add flags parameter to __block_write_begin_int Stefan Roesch
2022-02-14 19:02   ` Matthew Wilcox
2022-02-16 18:31     ` Stefan Roesch
2022-02-16 18:35       ` Matthew Wilcox
2022-02-14 17:43 ` [PATCH v1 02/14] mm: Introduce do_generic_perform_write Stefan Roesch
2022-02-14 19:06   ` Matthew Wilcox
2022-02-14 17:43 ` [PATCH v1 03/14] mm: add noio support in filemap_get_pages Stefan Roesch
2022-02-14 18:08   ` Matthew Wilcox
2022-02-16 18:27     ` Stefan Roesch
2022-02-14 19:33   ` Matthew Wilcox
2022-02-16 18:26     ` Stefan Roesch
2022-02-14 17:43 ` [PATCH v1 04/14] mm: Add support for async buffered writes Stefan Roesch
2022-02-14 19:09   ` Matthew Wilcox
2022-02-14 17:43 ` [PATCH v1 05/14] fs: split off __alloc_page_buffers function Stefan Roesch
2022-02-14 22:46   ` kernel test robot
2022-02-14 23:27   ` kernel test robot
2022-02-15  2:40   ` [RFC PATCH] fs: __alloc_page_buffers() can be static kernel test robot
2022-02-15  2:41   ` [PATCH v1 05/14] fs: split off __alloc_page_buffers function kernel test robot
2022-02-14 17:43 ` [PATCH v1 06/14] fs: split off __create_empty_buffers function Stefan Roesch
2022-02-14 17:43 ` [PATCH v1 07/14] fs: Add aop_flags parameter to create_page_buffers() Stefan Roesch
2022-02-14 18:14   ` Matthew Wilcox
2022-02-16 18:30     ` Stefan Roesch
2022-02-16 18:34       ` Matthew Wilcox
2022-02-16 18:35         ` Stefan Roesch
2022-02-14 17:43 ` [PATCH v1 08/14] fs: add support for async buffered writes Stefan Roesch
2022-02-14 17:43 ` [PATCH v1 09/14] io_uring: " Stefan Roesch
2022-02-14 17:43 ` [PATCH v1 10/14] io_uring: Add tracepoint for short writes Stefan Roesch
2022-02-14 17:44 ` Stefan Roesch [this message]
2022-02-14 17:44 ` [PATCH v1 12/14] mm: support write throttling for async buffered writes Stefan Roesch
2022-02-14 17:44 ` [PATCH v1 13/14] io_uring: " Stefan Roesch
2022-02-14 17:44 ` [PATCH v1 14/14] block: enable async buffered writes for block devices Stefan Roesch
2022-02-15  3:59 ` [PATCH v1 00/14] Support sync buffered writes for io-uring Hao Xu
2022-02-15 17:38   ` Stefan Roesch

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