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Subject[PATCH RFC PKS/PMEM 17/58] fs/nilfs2: Utilize new kmap_thread()
Date
From: Ira Weiny <ira.weiny@intel.com>

The kmap() calls in this FS are localized to a single thread. To avoid
the over head of global PKRS updates use the new kmap_thread() call.

Cc: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
---
fs/nilfs2/alloc.c | 34 +++++++++++++++++-----------------
fs/nilfs2/cpfile.c | 4 ++--
2 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/fs/nilfs2/alloc.c b/fs/nilfs2/alloc.c
index adf3bb0a8048..2aa4c34094ef 100644
--- a/fs/nilfs2/alloc.c
+++ b/fs/nilfs2/alloc.c
@@ -524,7 +524,7 @@ int nilfs_palloc_prepare_alloc_entry(struct inode *inode,
ret = nilfs_palloc_get_desc_block(inode, group, 1, &desc_bh);
if (ret < 0)
return ret;
- desc_kaddr = kmap(desc_bh->b_page);
+ desc_kaddr = kmap_thread(desc_bh->b_page);
desc = nilfs_palloc_block_get_group_desc(
inode, group, desc_bh, desc_kaddr);
n = nilfs_palloc_rest_groups_in_desc_block(inode, group,
@@ -536,7 +536,7 @@ int nilfs_palloc_prepare_alloc_entry(struct inode *inode,
inode, group, 1, &bitmap_bh);
if (ret < 0)
goto out_desc;
- bitmap_kaddr = kmap(bitmap_bh->b_page);
+ bitmap_kaddr = kmap_thread(bitmap_bh->b_page);
bitmap = bitmap_kaddr + bh_offset(bitmap_bh);
pos = nilfs_palloc_find_available_slot(
bitmap, group_offset,
@@ -547,21 +547,21 @@ int nilfs_palloc_prepare_alloc_entry(struct inode *inode,
desc, lock, -1);
req->pr_entry_nr =
entries_per_group * group + pos;
- kunmap(desc_bh->b_page);
- kunmap(bitmap_bh->b_page);
+ kunmap_thread(desc_bh->b_page);
+ kunmap_thread(bitmap_bh->b_page);

req->pr_desc_bh = desc_bh;
req->pr_bitmap_bh = bitmap_bh;
return 0;
}
- kunmap(bitmap_bh->b_page);
+ kunmap_thread(bitmap_bh->b_page);
brelse(bitmap_bh);
}

group_offset = 0;
}

- kunmap(desc_bh->b_page);
+ kunmap_thread(desc_bh->b_page);
brelse(desc_bh);
}

@@ -569,7 +569,7 @@ int nilfs_palloc_prepare_alloc_entry(struct inode *inode,
return -ENOSPC;

out_desc:
- kunmap(desc_bh->b_page);
+ kunmap_thread(desc_bh->b_page);
brelse(desc_bh);
return ret;
}
@@ -605,10 +605,10 @@ void nilfs_palloc_commit_free_entry(struct inode *inode,
spinlock_t *lock;

group = nilfs_palloc_group(inode, req->pr_entry_nr, &group_offset);
- desc_kaddr = kmap(req->pr_desc_bh->b_page);
+ desc_kaddr = kmap_thread(req->pr_desc_bh->b_page);
desc = nilfs_palloc_block_get_group_desc(inode, group,
req->pr_desc_bh, desc_kaddr);
- bitmap_kaddr = kmap(req->pr_bitmap_bh->b_page);
+ bitmap_kaddr = kmap_thread(req->pr_bitmap_bh->b_page);
bitmap = bitmap_kaddr + bh_offset(req->pr_bitmap_bh);
lock = nilfs_mdt_bgl_lock(inode, group);

@@ -620,8 +620,8 @@ void nilfs_palloc_commit_free_entry(struct inode *inode,
else
nilfs_palloc_group_desc_add_entries(desc, lock, 1);

- kunmap(req->pr_bitmap_bh->b_page);
- kunmap(req->pr_desc_bh->b_page);
+ kunmap_thread(req->pr_bitmap_bh->b_page);
+ kunmap_thread(req->pr_desc_bh->b_page);

mark_buffer_dirty(req->pr_desc_bh);
mark_buffer_dirty(req->pr_bitmap_bh);
@@ -646,10 +646,10 @@ void nilfs_palloc_abort_alloc_entry(struct inode *inode,
spinlock_t *lock;

group = nilfs_palloc_group(inode, req->pr_entry_nr, &group_offset);
- desc_kaddr = kmap(req->pr_desc_bh->b_page);
+ desc_kaddr = kmap_thread(req->pr_desc_bh->b_page);
desc = nilfs_palloc_block_get_group_desc(inode, group,
req->pr_desc_bh, desc_kaddr);
- bitmap_kaddr = kmap(req->pr_bitmap_bh->b_page);
+ bitmap_kaddr = kmap_thread(req->pr_bitmap_bh->b_page);
bitmap = bitmap_kaddr + bh_offset(req->pr_bitmap_bh);
lock = nilfs_mdt_bgl_lock(inode, group);

@@ -661,8 +661,8 @@ void nilfs_palloc_abort_alloc_entry(struct inode *inode,
else
nilfs_palloc_group_desc_add_entries(desc, lock, 1);

- kunmap(req->pr_bitmap_bh->b_page);
- kunmap(req->pr_desc_bh->b_page);
+ kunmap_thread(req->pr_bitmap_bh->b_page);
+ kunmap_thread(req->pr_desc_bh->b_page);

brelse(req->pr_bitmap_bh);
brelse(req->pr_desc_bh);
@@ -754,7 +754,7 @@ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems)
/* Get the first entry number of the group */
group_min_nr = (__u64)group * epg;

- bitmap_kaddr = kmap(bitmap_bh->b_page);
+ bitmap_kaddr = kmap_thread(bitmap_bh->b_page);
bitmap = bitmap_kaddr + bh_offset(bitmap_bh);
lock = nilfs_mdt_bgl_lock(inode, group);

@@ -800,7 +800,7 @@ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems)
entry_start = rounddown(group_offset, epb);
} while (true);

- kunmap(bitmap_bh->b_page);
+ kunmap_thread(bitmap_bh->b_page);
mark_buffer_dirty(bitmap_bh);
brelse(bitmap_bh);

diff --git a/fs/nilfs2/cpfile.c b/fs/nilfs2/cpfile.c
index 86d4d850d130..402ab8bfce29 100644
--- a/fs/nilfs2/cpfile.c
+++ b/fs/nilfs2/cpfile.c
@@ -235,11 +235,11 @@ int nilfs_cpfile_get_checkpoint(struct inode *cpfile,
ret = nilfs_cpfile_get_checkpoint_block(cpfile, cno, create, &cp_bh);
if (ret < 0)
goto out_header;
- kaddr = kmap(cp_bh->b_page);
+ kaddr = kmap_thread(cp_bh->b_page);
cp = nilfs_cpfile_block_get_checkpoint(cpfile, cno, cp_bh, kaddr);
if (nilfs_checkpoint_invalid(cp)) {
if (!create) {
- kunmap(cp_bh->b_page);
+ kunmap_thread(cp_bh->b_page);
brelse(cp_bh);
ret = -ENOENT;
goto out_header;
--
2.28.0.rc0.12.gb6a658bd00c9
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