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-rw-r--r--fs/cifs/file.c24
-rw-r--r--fs/fs-writeback.c4
-rw-r--r--fs/mpage.c22
-rw-r--r--fs/sync.c2
-rw-r--r--include/linux/kernel.h3
-rw-r--r--include/linux/writeback.h5
-rw-r--r--mm/filemap.c6
-rw-r--r--mm/page-writeback.c3
-rw-r--r--mm/vmscan.c2
9 files changed, 40 insertions, 31 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index e2b4ce1..487ea8b 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1079,9 +1079,9 @@ static int cifs_writepages(struct address_space *mapping,
unsigned int bytes_written;
struct cifs_sb_info *cifs_sb;
int done = 0;
- pgoff_t end = -1;
+ pgoff_t end;
pgoff_t index;
- int is_range = 0;
+ int range_whole = 0;
struct kvec iov[32];
int len;
int n_iov = 0;
@@ -1122,16 +1122,14 @@ static int cifs_writepages(struct address_space *mapping,
xid = GetXid();
pagevec_init(&pvec, 0);
- if (wbc->sync_mode == WB_SYNC_NONE)
+ if (wbc->range_cyclic) {
index = mapping->writeback_index; /* Start from prev offset */
- else {
- index = 0;
- scanned = 1;
- }
- if (wbc->start || wbc->end) {
- index = wbc->start >> PAGE_CACHE_SHIFT;
- end = wbc->end >> PAGE_CACHE_SHIFT;
- is_range = 1;
+ end = -1;
+ } else {
+ index = wbc->range_start >> PAGE_CACHE_SHIFT;
+ end = wbc->range_end >> PAGE_CACHE_SHIFT;
+ if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
+ range_whole = 1;
scanned = 1;
}
retry:
@@ -1167,7 +1165,7 @@ retry:
break;
}
- if (unlikely(is_range) && (page->index > end)) {
+ if (!wbc->range_cyclic && page->index > end) {
done = 1;
unlock_page(page);
break;
@@ -1271,7 +1269,7 @@ retry:
index = 0;
goto retry;
}
- if (!is_range)
+ if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
mapping->writeback_index = index;
FreeXid(xid);
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index f3fbe2d..6db95cf 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -461,6 +461,8 @@ void sync_inodes_sb(struct super_block *sb, int wait)
{
struct writeback_control wbc = {
.sync_mode = wait ? WB_SYNC_ALL : WB_SYNC_HOLD,
+ .range_start = 0,
+ .range_end = LLONG_MAX,
};
unsigned long nr_dirty = read_page_state(nr_dirty);
unsigned long nr_unstable = read_page_state(nr_unstable);
@@ -559,6 +561,8 @@ int write_inode_now(struct inode *inode, int sync)
struct writeback_control wbc = {
.nr_to_write = LONG_MAX,
.sync_mode = WB_SYNC_ALL,
+ .range_start = 0,
+ .range_end = LLONG_MAX,
};
if (!mapping_cap_writeback_dirty(inode->i_mapping))
diff --git a/fs/mpage.c b/fs/mpage.c
index 9bf2eb3..1e45982 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -707,9 +707,9 @@ mpage_writepages(struct address_space *mapping,
struct pagevec pvec;
int nr_pages;
pgoff_t index;
- pgoff_t end = -1; /* Inclusive */
+ pgoff_t end; /* Inclusive */
int scanned = 0;
- int is_range = 0;
+ int range_whole = 0;
if (wbc->nonblocking && bdi_write_congested(bdi)) {
wbc->encountered_congestion = 1;
@@ -721,16 +721,14 @@ mpage_writepages(struct address_space *mapping,
writepage = mapping->a_ops->writepage;
pagevec_init(&pvec, 0);
- if (wbc->sync_mode == WB_SYNC_NONE) {
+ if (wbc->range_cyclic) {
index = mapping->writeback_index; /* Start from prev offset */
+ end = -1;
} else {
- index = 0; /* whole-file sweep */
- scanned = 1;
- }
- if (wbc->start || wbc->end) {
- index = wbc->start >> PAGE_CACHE_SHIFT;
- end = wbc->end >> PAGE_CACHE_SHIFT;
- is_range = 1;
+ index = wbc->range_start >> PAGE_CACHE_SHIFT;
+ end = wbc->range_end >> PAGE_CACHE_SHIFT;
+ if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
+ range_whole = 1;
scanned = 1;
}
retry:
@@ -759,7 +757,7 @@ retry:
continue;
}
- if (unlikely(is_range) && page->index > end) {
+ if (!wbc->range_cyclic && page->index > end) {
done = 1;
unlock_page(page);
continue;
@@ -810,7 +808,7 @@ retry:
index = 0;
goto retry;
}
- if (!is_range)
+ if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
mapping->writeback_index = index;
if (bio)
mpage_bio_submit(WRITE, bio);
diff --git a/fs/sync.c b/fs/sync.c
index aab5ffe..955aef0 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -100,7 +100,7 @@ asmlinkage long sys_sync_file_range(int fd, loff_t offset, loff_t nbytes,
}
if (nbytes == 0)
- endbyte = -1;
+ endbyte = LLONG_MAX;
else
endbyte--; /* inclusive */
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index f4fc576..25fccd8 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -24,6 +24,9 @@ extern const char linux_banner[];
#define LONG_MAX ((long)(~0UL>>1))
#define LONG_MIN (-LONG_MAX - 1)
#define ULONG_MAX (~0UL)
+#define LLONG_MAX ((long long)(~0ULL>>1))
+#define LLONG_MIN (-LLONG_MAX - 1)
+#define ULLONG_MAX (~0ULL)
#define STACK_MAGIC 0xdeadbeef
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 56f92fc..9e38b56 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -50,14 +50,15 @@ struct writeback_control {
* a hint that the filesystem need only write out the pages inside that
* byterange. The byte at `end' is included in the writeout request.
*/
- loff_t start;
- loff_t end;
+ loff_t range_start;
+ loff_t range_end;
unsigned nonblocking:1; /* Don't get stuck on request queues */
unsigned encountered_congestion:1; /* An output: a queue is full */
unsigned for_kupdate:1; /* A kupdate writeback */
unsigned for_reclaim:1; /* Invoked from the page allocator */
unsigned for_writepages:1; /* This is a writepages() call */
+ unsigned range_cyclic:1; /* range_start is cyclic */
};
/*
diff --git a/mm/filemap.c b/mm/filemap.c
index fd57442..3342067 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -190,8 +190,8 @@ int __filemap_fdatawrite_range(struct address_space *mapping, loff_t start,
struct writeback_control wbc = {
.sync_mode = sync_mode,
.nr_to_write = mapping->nrpages * 2,
- .start = start,
- .end = end,
+ .range_start = start,
+ .range_end = end,
};
if (!mapping_cap_writeback_dirty(mapping))
@@ -204,7 +204,7 @@ int __filemap_fdatawrite_range(struct address_space *mapping, loff_t start,
static inline int __filemap_fdatawrite(struct address_space *mapping,
int sync_mode)
{
- return __filemap_fdatawrite_range(mapping, 0, 0, sync_mode);
+ return __filemap_fdatawrite_range(mapping, 0, LLONG_MAX, sync_mode);
}
int filemap_fdatawrite(struct address_space *mapping)
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 75d7f48..8ccf6f1 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -204,6 +204,7 @@ static void balance_dirty_pages(struct address_space *mapping)
.sync_mode = WB_SYNC_NONE,
.older_than_this = NULL,
.nr_to_write = write_chunk,
+ .range_cyclic = 1,
};
get_dirty_limits(&wbs, &background_thresh,
@@ -331,6 +332,7 @@ static void background_writeout(unsigned long _min_pages)
.older_than_this = NULL,
.nr_to_write = 0,
.nonblocking = 1,
+ .range_cyclic = 1,
};
for ( ; ; ) {
@@ -407,6 +409,7 @@ static void wb_kupdate(unsigned long arg)
.nr_to_write = 0,
.nonblocking = 1,
.for_kupdate = 1,
+ .range_cyclic = 1,
};
sync_supers();
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 46be8a0..bc5d4f4 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -339,6 +339,8 @@ pageout_t pageout(struct page *page, struct address_space *mapping)
struct writeback_control wbc = {
.sync_mode = WB_SYNC_NONE,
.nr_to_write = SWAP_CLUSTER_MAX,
+ .range_start = 0,
+ .range_end = LLONG_MAX,
.nonblocking = 1,
.for_reclaim = 1,
};
generated by cgit v1.1 at 2024-12-24 00:39:30 +0000