From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM
---
kernel/include/linux/writeback.h | 81 ++++++++++++++++++++++++++--------------
1 files changed, 53 insertions(+), 28 deletions(-)
diff --git a/kernel/include/linux/writeback.h b/kernel/include/linux/writeback.h
index fdfd04e..8e5c5bb 100644
--- a/kernel/include/linux/writeback.h
+++ b/kernel/include/linux/writeback.h
@@ -11,6 +11,7 @@
#include <linux/flex_proportions.h>
#include <linux/backing-dev-defs.h>
#include <linux/blk_types.h>
+#include <linux/blk-cgroup.h>
struct bio;
@@ -68,6 +69,17 @@
unsigned for_reclaim:1; /* Invoked from the page allocator */
unsigned range_cyclic:1; /* range_start is cyclic */
unsigned for_sync:1; /* sync(2) WB_SYNC_ALL writeback */
+
+ /*
+ * When writeback IOs are bounced through async layers, only the
+ * initial synchronous phase should be accounted towards inode
+ * cgroup ownership arbitration to avoid confusion. Later stages
+ * can set the following flag to disable the accounting.
+ */
+ unsigned no_cgroup_owner:1;
+
+ unsigned punt_to_cgroup:1; /* cgrp punting, see __REQ_CGROUP_PUNT */
+
#ifdef CONFIG_CGROUP_WRITEBACK
struct bdi_writeback *wb; /* wb this writeback is issued under */
struct inode *inode; /* inode being written out */
@@ -84,12 +96,27 @@
static inline int wbc_to_write_flags(struct writeback_control *wbc)
{
- if (wbc->sync_mode == WB_SYNC_ALL)
- return REQ_SYNC;
- else if (wbc->for_kupdate || wbc->for_background)
- return REQ_BACKGROUND;
+ int flags = 0;
- return 0;
+ if (wbc->punt_to_cgroup)
+ flags = REQ_CGROUP_PUNT;
+
+ if (wbc->sync_mode == WB_SYNC_ALL)
+ flags |= REQ_SYNC;
+ else if (wbc->for_kupdate || wbc->for_background)
+ flags |= REQ_BACKGROUND;
+
+ return flags;
+}
+
+static inline struct cgroup_subsys_state *
+wbc_blkcg_css(struct writeback_control *wbc)
+{
+#ifdef CONFIG_CGROUP_WRITEBACK
+ if (wbc->wb)
+ return wbc->wb->blkcg_css;
+#endif
+ return blkcg_root_css;
}
/*
@@ -170,6 +197,7 @@
void wakeup_flusher_threads_bdi(struct backing_dev_info *bdi,
enum wb_reason reason);
void inode_wait_for_writeback(struct inode *inode);
+void inode_io_list_del(struct inode *inode);
/* writeback.h requires fs.h; it, too, is not included from here. */
static inline void wait_on_inode(struct inode *inode)
@@ -188,8 +216,10 @@
struct inode *inode)
__releases(&inode->i_lock);
void wbc_detach_inode(struct writeback_control *wbc);
-void wbc_account_io(struct writeback_control *wbc, struct page *page,
- size_t bytes);
+void wbc_account_cgroup_owner(struct writeback_control *wbc, struct page *page,
+ size_t bytes);
+int cgroup_writeback_by_id(u64 bdi_id, int memcg_id, unsigned long nr_pages,
+ enum wb_reason reason, struct wb_completion *done);
void cgroup_writeback_umount(void);
/**
@@ -246,7 +276,8 @@
*
* @bio is a part of the writeback in progress controlled by @wbc. Perform
* writeback specific initialization. This is used to apply the cgroup
- * writeback context.
+ * writeback context. Must be called after the bio has been associated with
+ * a device.
*/
static inline void wbc_init_bio(struct writeback_control *wbc, struct bio *bio)
{
@@ -257,7 +288,7 @@
* regular writeback instead of writing things out itself.
*/
if (wbc->wb)
- bio_associate_blkcg(bio, wbc->wb->blkcg_css);
+ bio_associate_blkg_from_css(bio, wbc->wb->blkcg_css);
}
#else /* CONFIG_CGROUP_WRITEBACK */
@@ -290,8 +321,8 @@
{
}
-static inline void wbc_account_io(struct writeback_control *wbc,
- struct page *page, size_t bytes)
+static inline void wbc_account_cgroup_owner(struct writeback_control *wbc,
+ struct page *page, size_t bytes)
{
}
@@ -332,24 +363,18 @@
extern int block_dump;
extern int laptop_mode;
-extern int dirty_background_ratio_handler(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos);
-extern int dirty_background_bytes_handler(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos);
-extern int dirty_ratio_handler(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos);
-extern int dirty_bytes_handler(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos);
+int dirty_background_ratio_handler(struct ctl_table *table, int write,
+ void *buffer, size_t *lenp, loff_t *ppos);
+int dirty_background_bytes_handler(struct ctl_table *table, int write,
+ void *buffer, size_t *lenp, loff_t *ppos);
+int dirty_ratio_handler(struct ctl_table *table, int write,
+ void *buffer, size_t *lenp, loff_t *ppos);
+int dirty_bytes_handler(struct ctl_table *table, int write,
+ void *buffer, size_t *lenp, loff_t *ppos);
int dirtytime_interval_handler(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos);
-
-struct ctl_table;
-int dirty_writeback_centisecs_handler(struct ctl_table *, int,
- void __user *, size_t *, loff_t *);
+ void *buffer, size_t *lenp, loff_t *ppos);
+int dirty_writeback_centisecs_handler(struct ctl_table *table, int write,
+ void *buffer, size_t *lenp, loff_t *ppos);
void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty);
unsigned long wb_calc_thresh(struct bdi_writeback *wb, unsigned long thresh);
--
Gitblit v1.6.2