From: Stefan Roesch <[email protected]>
To: <[email protected]>, <[email protected]>,
<[email protected]>, <[email protected]>
Cc: <[email protected]>
Subject: [PATCH v2 10/13] sched: add new fields to task_struct
Date: Fri, 18 Feb 2022 11:57:36 -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
next prev parent reply other threads:[~2022-02-18 19:58 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-18 19:57 [PATCH v2 00/13] Support sync buffered writes for io-uring Stefan Roesch
2022-02-18 19:57 ` [PATCH v2 01/13] fs: Add flags parameter to __block_write_begin_int Stefan Roesch
2022-02-18 19:59 ` Matthew Wilcox
2022-02-18 20:08 ` Stefan Roesch
2022-02-18 20:13 ` Matthew Wilcox
2022-02-18 20:14 ` Stefan Roesch
2022-02-18 20:22 ` Matthew Wilcox
2022-02-18 20:25 ` Stefan Roesch
2022-02-18 20:35 ` Matthew Wilcox
2022-02-18 20:39 ` Stefan Roesch
2022-02-18 19:57 ` [PATCH v2 02/13] mm: Introduce do_generic_perform_write Stefan Roesch
2022-02-18 19:57 ` [PATCH v2 03/13] mm: Add support for async buffered writes Stefan Roesch
2022-02-18 19:57 ` [PATCH v2 04/13] fs: split off __alloc_page_buffers function Stefan Roesch
2022-02-18 20:42 ` Matthew Wilcox
2022-02-18 20:50 ` Stefan Roesch
2022-02-19 7:35 ` Christoph Hellwig
2022-02-20 4:23 ` Matthew Wilcox
2022-02-20 4:38 ` Jens Axboe
2022-02-20 4:51 ` Jens Axboe
2022-02-22 8:18 ` Christoph Hellwig
2022-02-22 23:19 ` Jens Axboe
2022-02-18 19:57 ` [PATCH v2 05/13] fs: split off __create_empty_buffers function Stefan Roesch
2022-02-18 19:57 ` [PATCH v2 06/13] fs: Add gfp_t parameter to create_page_buffers() Stefan Roesch
2022-02-21 0:18 ` kernel test robot
2022-02-18 19:57 ` [PATCH v2 07/13] fs: add support for async buffered writes Stefan Roesch
2022-02-18 19:57 ` [PATCH v2 08/13] io_uring: " Stefan Roesch
2022-02-18 19:57 ` [PATCH v2 09/13] io_uring: Add tracepoint for short writes Stefan Roesch
2022-02-18 19:57 ` Stefan Roesch [this message]
2022-02-18 19:57 ` [PATCH v2 11/13] mm: support write throttling for async buffered writes Stefan Roesch
2022-02-18 19:57 ` [PATCH v2 12/13] io_uring: " Stefan Roesch
2022-02-18 19:57 ` [PATCH v2 13/13] block: enable async buffered writes for block devices Stefan Roesch
2022-02-20 22:38 ` [PATCH v2 00/13] Support sync buffered writes for io-uring Dave Chinner
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