* [PATCH 1/9] btrfs: send: use GFP_KERNEL everywhere
2016-02-11 16:56 [PULL][PATCH 0/9] GFP_NOFS flags cleanup, part 2 David Sterba
@ 2016-02-11 16:56 ` David Sterba
2016-02-11 16:56 ` [PATCH 2/9] btrfs: reada: " David Sterba
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: David Sterba @ 2016-02-11 16:56 UTC (permalink / raw)
To: linux-btrfs; +Cc: David Sterba
The send operation is not on the critical writeback path we don't need
to use GFP_NOFS for allocations. All error paths are handled and the
whole operation is restartable.
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/ctree.c | 2 +-
fs/btrfs/send.c | 36 ++++++++++++++++++------------------
2 files changed, 19 insertions(+), 19 deletions(-)
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 769e0ff1b4ce..00741eb94651 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -5361,7 +5361,7 @@ int btrfs_compare_trees(struct btrfs_root *left_root,
goto out;
}
- tmp_buf = kmalloc(left_root->nodesize, GFP_NOFS);
+ tmp_buf = kmalloc(left_root->nodesize, GFP_KERNEL);
if (!tmp_buf) {
ret = -ENOMEM;
goto out;
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 63a6152be04b..d2e29925f1da 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -304,7 +304,7 @@ static struct fs_path *fs_path_alloc(void)
{
struct fs_path *p;
- p = kmalloc(sizeof(*p), GFP_NOFS);
+ p = kmalloc(sizeof(*p), GFP_KERNEL);
if (!p)
return NULL;
p->reversed = 0;
@@ -363,11 +363,11 @@ static int fs_path_ensure_buf(struct fs_path *p, int len)
* First time the inline_buf does not suffice
*/
if (p->buf == p->inline_buf) {
- tmp_buf = kmalloc(len, GFP_NOFS);
+ tmp_buf = kmalloc(len, GFP_KERNEL);
if (tmp_buf)
memcpy(tmp_buf, p->buf, old_buf_len);
} else {
- tmp_buf = krealloc(p->buf, len, GFP_NOFS);
+ tmp_buf = krealloc(p->buf, len, GFP_KERNEL);
}
if (!tmp_buf)
return -ENOMEM;
@@ -995,7 +995,7 @@ static int iterate_dir_item(struct btrfs_root *root, struct btrfs_path *path,
* values are small.
*/
buf_len = PATH_MAX;
- buf = kmalloc(buf_len, GFP_NOFS);
+ buf = kmalloc(buf_len, GFP_KERNEL);
if (!buf) {
ret = -ENOMEM;
goto out;
@@ -1042,7 +1042,7 @@ static int iterate_dir_item(struct btrfs_root *root, struct btrfs_path *path,
buf = NULL;
} else {
char *tmp = krealloc(buf, buf_len,
- GFP_NOFS | __GFP_NOWARN);
+ GFP_KERNEL | __GFP_NOWARN);
if (!tmp)
kfree(buf);
@@ -1303,7 +1303,7 @@ static int find_extent_clone(struct send_ctx *sctx,
/* We only use this path under the commit sem */
tmp_path->need_commit_sem = 0;
- backref_ctx = kmalloc(sizeof(*backref_ctx), GFP_NOFS);
+ backref_ctx = kmalloc(sizeof(*backref_ctx), GFP_KERNEL);
if (!backref_ctx) {
ret = -ENOMEM;
goto out;
@@ -1984,7 +1984,7 @@ static int name_cache_insert(struct send_ctx *sctx,
nce_head = radix_tree_lookup(&sctx->name_cache,
(unsigned long)nce->ino);
if (!nce_head) {
- nce_head = kmalloc(sizeof(*nce_head), GFP_NOFS);
+ nce_head = kmalloc(sizeof(*nce_head), GFP_KERNEL);
if (!nce_head) {
kfree(nce);
return -ENOMEM;
@@ -2179,7 +2179,7 @@ static int __get_cur_name_and_parent(struct send_ctx *sctx,
/*
* Store the result of the lookup in the name cache.
*/
- nce = kmalloc(sizeof(*nce) + fs_path_len(dest) + 1, GFP_NOFS);
+ nce = kmalloc(sizeof(*nce) + fs_path_len(dest) + 1, GFP_KERNEL);
if (!nce) {
ret = -ENOMEM;
goto out;
@@ -2315,7 +2315,7 @@ static int send_subvol_begin(struct send_ctx *sctx)
if (!path)
return -ENOMEM;
- name = kmalloc(BTRFS_PATH_NAME_MAX, GFP_NOFS);
+ name = kmalloc(BTRFS_PATH_NAME_MAX, GFP_KERNEL);
if (!name) {
btrfs_free_path(path);
return -ENOMEM;
@@ -2730,7 +2730,7 @@ static int __record_ref(struct list_head *head, u64 dir,
{
struct recorded_ref *ref;
- ref = kmalloc(sizeof(*ref), GFP_NOFS);
+ ref = kmalloc(sizeof(*ref), GFP_KERNEL);
if (!ref)
return -ENOMEM;
@@ -2755,7 +2755,7 @@ static int dup_ref(struct recorded_ref *ref, struct list_head *list)
{
struct recorded_ref *new;
- new = kmalloc(sizeof(*ref), GFP_NOFS);
+ new = kmalloc(sizeof(*ref), GFP_KERNEL);
if (!new)
return -ENOMEM;
@@ -2818,7 +2818,7 @@ add_orphan_dir_info(struct send_ctx *sctx, u64 dir_ino)
struct rb_node *parent = NULL;
struct orphan_dir_info *entry, *odi;
- odi = kmalloc(sizeof(*odi), GFP_NOFS);
+ odi = kmalloc(sizeof(*odi), GFP_KERNEL);
if (!odi)
return ERR_PTR(-ENOMEM);
odi->ino = dir_ino;
@@ -2973,7 +2973,7 @@ static int add_waiting_dir_move(struct send_ctx *sctx, u64 ino, bool orphanized)
struct rb_node *parent = NULL;
struct waiting_dir_move *entry, *dm;
- dm = kmalloc(sizeof(*dm), GFP_NOFS);
+ dm = kmalloc(sizeof(*dm), GFP_KERNEL);
if (!dm)
return -ENOMEM;
dm->ino = ino;
@@ -3040,7 +3040,7 @@ static int add_pending_dir_move(struct send_ctx *sctx,
int exists = 0;
int ret;
- pm = kmalloc(sizeof(*pm), GFP_NOFS);
+ pm = kmalloc(sizeof(*pm), GFP_KERNEL);
if (!pm)
return -ENOMEM;
pm->parent_ino = parent_ino;
@@ -4280,7 +4280,7 @@ static int __find_xattr(int num, struct btrfs_key *di_key,
strncmp(name, ctx->name, name_len) == 0) {
ctx->found_idx = num;
ctx->found_data_len = data_len;
- ctx->found_data = kmemdup(data, data_len, GFP_NOFS);
+ ctx->found_data = kmemdup(data, data_len, GFP_KERNEL);
if (!ctx->found_data)
return -ENOMEM;
return 1;
@@ -4481,7 +4481,7 @@ static ssize_t fill_read_buf(struct send_ctx *sctx, u64 offset, u32 len)
while (index <= last_index) {
unsigned cur_len = min_t(unsigned, len,
PAGE_CACHE_SIZE - pg_offset);
- page = find_or_create_page(inode->i_mapping, index, GFP_NOFS);
+ page = find_or_create_page(inode->i_mapping, index, GFP_KERNEL);
if (!page) {
ret = -ENOMEM;
break;
@@ -5989,7 +5989,7 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
goto out;
}
- sctx = kzalloc(sizeof(struct send_ctx), GFP_NOFS);
+ sctx = kzalloc(sizeof(struct send_ctx), GFP_KERNEL);
if (!sctx) {
ret = -ENOMEM;
goto out;
@@ -5997,7 +5997,7 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
INIT_LIST_HEAD(&sctx->new_refs);
INIT_LIST_HEAD(&sctx->deleted_refs);
- INIT_RADIX_TREE(&sctx->name_cache, GFP_NOFS);
+ INIT_RADIX_TREE(&sctx->name_cache, GFP_KERNEL);
INIT_LIST_HEAD(&sctx->name_cache_list);
sctx->flags = arg->flags;
--
2.7.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 2/9] btrfs: reada: use GFP_KERNEL everywhere
2016-02-11 16:56 [PULL][PATCH 0/9] GFP_NOFS flags cleanup, part 2 David Sterba
2016-02-11 16:56 ` [PATCH 1/9] btrfs: send: use GFP_KERNEL everywhere David Sterba
@ 2016-02-11 16:56 ` David Sterba
2016-02-11 16:57 ` [PATCH 3/9] btrfs: scrub: use GFP_KERNEL on the submission path David Sterba
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: David Sterba @ 2016-02-11 16:56 UTC (permalink / raw)
To: linux-btrfs; +Cc: David Sterba
The readahead framework is not on the critical writeback path we don't
need to use GFP_NOFS for allocations. All error paths are handled and
the readahead failures are not fatal. The actual users (scrub,
dev-replace) will trigger reads if the blocks are not found in cache.
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/reada.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index 619f92963e27..c5f1773c4794 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -280,7 +280,7 @@ static struct reada_zone *reada_find_zone(struct btrfs_fs_info *fs_info,
end = start + cache->key.offset - 1;
btrfs_put_block_group(cache);
- zone = kzalloc(sizeof(*zone), GFP_NOFS);
+ zone = kzalloc(sizeof(*zone), GFP_KERNEL);
if (!zone)
return NULL;
@@ -343,7 +343,7 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
if (re)
return re;
- re = kzalloc(sizeof(*re), GFP_NOFS);
+ re = kzalloc(sizeof(*re), GFP_KERNEL);
if (!re)
return NULL;
@@ -566,7 +566,7 @@ static int reada_add_block(struct reada_control *rc, u64 logical,
if (!re)
return -1;
- rec = kzalloc(sizeof(*rec), GFP_NOFS);
+ rec = kzalloc(sizeof(*rec), GFP_KERNEL);
if (!rec) {
reada_extent_put(root->fs_info, re);
return -ENOMEM;
@@ -791,7 +791,7 @@ static void reada_start_machine(struct btrfs_fs_info *fs_info)
{
struct reada_machine_work *rmw;
- rmw = kzalloc(sizeof(*rmw), GFP_NOFS);
+ rmw = kzalloc(sizeof(*rmw), GFP_KERNEL);
if (!rmw) {
/* FIXME we cannot handle this properly right now */
BUG();
@@ -926,7 +926,7 @@ struct reada_control *btrfs_reada_add(struct btrfs_root *root,
.offset = (u64)-1
};
- rc = kzalloc(sizeof(*rc), GFP_NOFS);
+ rc = kzalloc(sizeof(*rc), GFP_KERNEL);
if (!rc)
return ERR_PTR(-ENOMEM);
--
2.7.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 3/9] btrfs: scrub: use GFP_KERNEL on the submission path
2016-02-11 16:56 [PULL][PATCH 0/9] GFP_NOFS flags cleanup, part 2 David Sterba
2016-02-11 16:56 ` [PATCH 1/9] btrfs: send: use GFP_KERNEL everywhere David Sterba
2016-02-11 16:56 ` [PATCH 2/9] btrfs: reada: " David Sterba
@ 2016-02-11 16:57 ` David Sterba
2016-02-11 16:57 ` [PATCH 4/9] btrfs: let callers of btrfs_alloc_root pass gfp flags David Sterba
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: David Sterba @ 2016-02-11 16:57 UTC (permalink / raw)
To: linux-btrfs; +Cc: David Sterba
Scrub is not on the critical writeback path we don't need to use
GFP_NOFS for all allocations. The failures are handled and stats passed
back to userspace.
Let's use GFP_KERNEL on the paths where everything is ok, ie. setup the
global structures and the IO submission paths.
Functions that do the repair and fixups still use GFP_NOFS as we might
want to skip any other filesystem activity if we encounter an error.
This could turn out to be unnecessary, but requires more review compared
to the easy cases in this patch.
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/dev-replace.c | 2 +-
fs/btrfs/scrub.c | 24 +++++++++++++-----------
2 files changed, 14 insertions(+), 12 deletions(-)
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index cbb7dbfb3fff..01ce5fcecc5c 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -802,7 +802,7 @@ static int btrfs_dev_replace_kthread(void *data)
struct btrfs_ioctl_dev_replace_args *status_args;
u64 progress;
- status_args = kzalloc(sizeof(*status_args), GFP_NOFS);
+ status_args = kzalloc(sizeof(*status_args), GFP_KERNEL);
if (status_args) {
btrfs_dev_replace_status(fs_info, status_args);
progress = status_args->status.progress_1000;
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 92bf5ee732fb..2de7817d0e1b 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -461,7 +461,7 @@ struct scrub_ctx *scrub_setup_ctx(struct btrfs_device *dev, int is_dev_replace)
struct btrfs_fs_info *fs_info = dev->dev_root->fs_info;
int ret;
- sctx = kzalloc(sizeof(*sctx), GFP_NOFS);
+ sctx = kzalloc(sizeof(*sctx), GFP_KERNEL);
if (!sctx)
goto nomem;
atomic_set(&sctx->refs, 1);
@@ -472,7 +472,7 @@ struct scrub_ctx *scrub_setup_ctx(struct btrfs_device *dev, int is_dev_replace)
for (i = 0; i < SCRUB_BIOS_PER_SCTX; ++i) {
struct scrub_bio *sbio;
- sbio = kzalloc(sizeof(*sbio), GFP_NOFS);
+ sbio = kzalloc(sizeof(*sbio), GFP_KERNEL);
if (!sbio)
goto nomem;
sctx->bios[i] = sbio;
@@ -1654,7 +1654,7 @@ static int scrub_add_page_to_wr_bio(struct scrub_ctx *sctx,
again:
if (!wr_ctx->wr_curr_bio) {
wr_ctx->wr_curr_bio = kzalloc(sizeof(*wr_ctx->wr_curr_bio),
- GFP_NOFS);
+ GFP_KERNEL);
if (!wr_ctx->wr_curr_bio) {
mutex_unlock(&wr_ctx->wr_lock);
return -ENOMEM;
@@ -1671,7 +1671,8 @@ static int scrub_add_page_to_wr_bio(struct scrub_ctx *sctx,
sbio->dev = wr_ctx->tgtdev;
bio = sbio->bio;
if (!bio) {
- bio = btrfs_io_bio_alloc(GFP_NOFS, wr_ctx->pages_per_wr_bio);
+ bio = btrfs_io_bio_alloc(GFP_KERNEL,
+ wr_ctx->pages_per_wr_bio);
if (!bio) {
mutex_unlock(&wr_ctx->wr_lock);
return -ENOMEM;
@@ -2076,7 +2077,8 @@ static int scrub_add_page_to_rd_bio(struct scrub_ctx *sctx,
sbio->dev = spage->dev;
bio = sbio->bio;
if (!bio) {
- bio = btrfs_io_bio_alloc(GFP_NOFS, sctx->pages_per_rd_bio);
+ bio = btrfs_io_bio_alloc(GFP_KERNEL,
+ sctx->pages_per_rd_bio);
if (!bio)
return -ENOMEM;
sbio->bio = bio;
@@ -2241,7 +2243,7 @@ static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
struct scrub_block *sblock;
int index;
- sblock = kzalloc(sizeof(*sblock), GFP_NOFS);
+ sblock = kzalloc(sizeof(*sblock), GFP_KERNEL);
if (!sblock) {
spin_lock(&sctx->stat_lock);
sctx->stat.malloc_errors++;
@@ -2259,7 +2261,7 @@ static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
struct scrub_page *spage;
u64 l = min_t(u64, len, PAGE_SIZE);
- spage = kzalloc(sizeof(*spage), GFP_NOFS);
+ spage = kzalloc(sizeof(*spage), GFP_KERNEL);
if (!spage) {
leave_nomem:
spin_lock(&sctx->stat_lock);
@@ -2286,7 +2288,7 @@ static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
spage->have_csum = 0;
}
sblock->page_count++;
- spage->page = alloc_page(GFP_NOFS);
+ spage->page = alloc_page(GFP_KERNEL);
if (!spage->page)
goto leave_nomem;
len -= l;
@@ -2541,7 +2543,7 @@ static int scrub_pages_for_parity(struct scrub_parity *sparity,
struct scrub_block *sblock;
int index;
- sblock = kzalloc(sizeof(*sblock), GFP_NOFS);
+ sblock = kzalloc(sizeof(*sblock), GFP_KERNEL);
if (!sblock) {
spin_lock(&sctx->stat_lock);
sctx->stat.malloc_errors++;
@@ -2561,7 +2563,7 @@ static int scrub_pages_for_parity(struct scrub_parity *sparity,
struct scrub_page *spage;
u64 l = min_t(u64, len, PAGE_SIZE);
- spage = kzalloc(sizeof(*spage), GFP_NOFS);
+ spage = kzalloc(sizeof(*spage), GFP_KERNEL);
if (!spage) {
leave_nomem:
spin_lock(&sctx->stat_lock);
@@ -2591,7 +2593,7 @@ static int scrub_pages_for_parity(struct scrub_parity *sparity,
spage->have_csum = 0;
}
sblock->page_count++;
- spage->page = alloc_page(GFP_NOFS);
+ spage->page = alloc_page(GFP_KERNEL);
if (!spage->page)
goto leave_nomem;
len -= l;
--
2.7.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 4/9] btrfs: let callers of btrfs_alloc_root pass gfp flags
2016-02-11 16:56 [PULL][PATCH 0/9] GFP_NOFS flags cleanup, part 2 David Sterba
` (2 preceding siblings ...)
2016-02-11 16:57 ` [PATCH 3/9] btrfs: scrub: use GFP_KERNEL on the submission path David Sterba
@ 2016-02-11 16:57 ` David Sterba
2016-02-11 16:57 ` [PATCH 5/9] btrfs: fallocate: use GFP_KERNEL David Sterba
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: David Sterba @ 2016-02-11 16:57 UTC (permalink / raw)
To: linux-btrfs; +Cc: David Sterba
We don't need to use GFP_NOFS in all contexts, eg. during mount or for
dummy root tree, but we might for the the log tree creation.
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/disk-io.c | 21 +++++++++++----------
1 file changed, 11 insertions(+), 10 deletions(-)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 4545e2e2ad45..40690e90beee 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1296,9 +1296,10 @@ static void __setup_root(u32 nodesize, u32 sectorsize, u32 stripesize,
spin_lock_init(&root->root_item_lock);
}
-static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info)
+static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info,
+ gfp_t flags)
{
- struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS);
+ struct btrfs_root *root = kzalloc(sizeof(*root), flags);
if (root)
root->fs_info = fs_info;
return root;
@@ -1310,7 +1311,7 @@ struct btrfs_root *btrfs_alloc_dummy_root(void)
{
struct btrfs_root *root;
- root = btrfs_alloc_root(NULL);
+ root = btrfs_alloc_root(NULL, GFP_KERNEL);
if (!root)
return ERR_PTR(-ENOMEM);
__setup_root(4096, 4096, 4096, root, NULL, 1);
@@ -1332,7 +1333,7 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
int ret = 0;
uuid_le uuid;
- root = btrfs_alloc_root(fs_info);
+ root = btrfs_alloc_root(fs_info, GFP_KERNEL);
if (!root)
return ERR_PTR(-ENOMEM);
@@ -1408,7 +1409,7 @@ static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
struct btrfs_root *tree_root = fs_info->tree_root;
struct extent_buffer *leaf;
- root = btrfs_alloc_root(fs_info);
+ root = btrfs_alloc_root(fs_info, GFP_NOFS);
if (!root)
return ERR_PTR(-ENOMEM);
@@ -1506,7 +1507,7 @@ static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root,
if (!path)
return ERR_PTR(-ENOMEM);
- root = btrfs_alloc_root(fs_info);
+ root = btrfs_alloc_root(fs_info, GFP_NOFS);
if (!root) {
ret = -ENOMEM;
goto alloc_fail;
@@ -2385,7 +2386,7 @@ static int btrfs_replay_log(struct btrfs_fs_info *fs_info,
return -EIO;
}
- log_tree_root = btrfs_alloc_root(fs_info);
+ log_tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL);
if (!log_tree_root)
return -ENOMEM;
@@ -2510,8 +2511,8 @@ int open_ctree(struct super_block *sb,
int backup_index = 0;
int max_active;
- tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info);
- chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info);
+ tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL);
+ chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info, GFP_KERNEL);
if (!tree_root || !chunk_root) {
err = -ENOMEM;
goto fail;
@@ -2622,7 +2623,7 @@ int open_ctree(struct super_block *sb,
INIT_LIST_HEAD(&fs_info->ordered_roots);
spin_lock_init(&fs_info->ordered_root_lock);
fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root),
- GFP_NOFS);
+ GFP_KERNEL);
if (!fs_info->delayed_root) {
err = -ENOMEM;
goto fail_iput;
--
2.7.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 5/9] btrfs: fallocate: use GFP_KERNEL
2016-02-11 16:56 [PULL][PATCH 0/9] GFP_NOFS flags cleanup, part 2 David Sterba
` (3 preceding siblings ...)
2016-02-11 16:57 ` [PATCH 4/9] btrfs: let callers of btrfs_alloc_root pass gfp flags David Sterba
@ 2016-02-11 16:57 ` David Sterba
2016-02-11 16:57 ` [PATCH 6/9] btrfs: readdir: " David Sterba
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: David Sterba @ 2016-02-11 16:57 UTC (permalink / raw)
To: linux-btrfs; +Cc: David Sterba
Fallocate is initiated from userspace and is not on the critical
writeback path, we don't need to use GFP_NOFS for allocations.
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/file.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 098bb8f690c9..5d46fdc4651c 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -2611,7 +2611,7 @@ static int add_falloc_range(struct list_head *head, u64 start, u64 len)
return 0;
}
insert:
- range = kmalloc(sizeof(*range), GFP_NOFS);
+ range = kmalloc(sizeof(*range), GFP_KERNEL);
if (!range)
return -ENOMEM;
range->start = start;
@@ -2712,7 +2712,7 @@ static long btrfs_fallocate(struct file *file, int mode,
btrfs_put_ordered_extent(ordered);
unlock_extent_cached(&BTRFS_I(inode)->io_tree,
alloc_start, locked_end,
- &cached_state, GFP_NOFS);
+ &cached_state, GFP_KERNEL);
/*
* we can't wait on the range with the transaction
* running or with the extent lock held
@@ -2806,7 +2806,7 @@ static long btrfs_fallocate(struct file *file, int mode,
}
out_unlock:
unlock_extent_cached(&BTRFS_I(inode)->io_tree, alloc_start, locked_end,
- &cached_state, GFP_NOFS);
+ &cached_state, GFP_KERNEL);
out:
/*
* As we waited the extent range, the data_rsv_map must be empty
--
2.7.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 6/9] btrfs: readdir: use GFP_KERNEL
2016-02-11 16:56 [PULL][PATCH 0/9] GFP_NOFS flags cleanup, part 2 David Sterba
` (4 preceding siblings ...)
2016-02-11 16:57 ` [PATCH 5/9] btrfs: fallocate: use GFP_KERNEL David Sterba
@ 2016-02-11 16:57 ` David Sterba
2016-02-11 16:57 ` [PATCH 7/9] btrfs: device add and remove: " David Sterba
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: David Sterba @ 2016-02-11 16:57 UTC (permalink / raw)
To: linux-btrfs; +Cc: David Sterba
Readdir is initiated from userspace and is not on the critical
writeback path, we don't need to use GFP_NOFS for allocations.
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 5f06eb1f4384..2bd47fb228b2 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5788,7 +5788,7 @@ static int btrfs_real_readdir(struct file *file, struct dir_context *ctx)
if (name_len <= sizeof(tmp_name)) {
name_ptr = tmp_name;
} else {
- name_ptr = kmalloc(name_len, GFP_NOFS);
+ name_ptr = kmalloc(name_len, GFP_KERNEL);
if (!name_ptr) {
ret = -ENOMEM;
goto err;
--
2.7.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 7/9] btrfs: device add and remove: use GFP_KERNEL
2016-02-11 16:56 [PULL][PATCH 0/9] GFP_NOFS flags cleanup, part 2 David Sterba
` (5 preceding siblings ...)
2016-02-11 16:57 ` [PATCH 6/9] btrfs: readdir: " David Sterba
@ 2016-02-11 16:57 ` David Sterba
2016-02-11 16:57 ` [PATCH 8/9] btrfs: extent same: use GFP_KERNEL for page array allocations David Sterba
2016-02-11 16:57 ` [PATCH 9/9] btrfs: switch to kcalloc in btrfs_cmp_data_prepare David Sterba
8 siblings, 0 replies; 10+ messages in thread
From: David Sterba @ 2016-02-11 16:57 UTC (permalink / raw)
To: linux-btrfs; +Cc: David Sterba
We can safely use GFP_KERNEL in the functions called from the ioctl
handlers.
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/volumes.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 366b335946fa..64c59795220e 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -138,7 +138,7 @@ static struct btrfs_fs_devices *__alloc_fs_devices(void)
{
struct btrfs_fs_devices *fs_devs;
- fs_devs = kzalloc(sizeof(*fs_devs), GFP_NOFS);
+ fs_devs = kzalloc(sizeof(*fs_devs), GFP_KERNEL);
if (!fs_devs)
return ERR_PTR(-ENOMEM);
@@ -220,7 +220,7 @@ static struct btrfs_device *__alloc_device(void)
{
struct btrfs_device *dev;
- dev = kzalloc(sizeof(*dev), GFP_NOFS);
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return ERR_PTR(-ENOMEM);
@@ -733,7 +733,8 @@ static struct btrfs_fs_devices *clone_fs_devices(struct btrfs_fs_devices *orig)
* uuid mutex so nothing we touch in here is going to disappear.
*/
if (orig_dev->name) {
- name = rcu_string_strdup(orig_dev->name->str, GFP_NOFS);
+ name = rcu_string_strdup(orig_dev->name->str,
+ GFP_KERNEL);
if (!name) {
kfree(device);
goto error;
@@ -2287,7 +2288,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
goto error;
}
- name = rcu_string_strdup(device_path, GFP_NOFS);
+ name = rcu_string_strdup(device_path, GFP_KERNEL);
if (!name) {
kfree(device);
ret = -ENOMEM;
--
2.7.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 8/9] btrfs: extent same: use GFP_KERNEL for page array allocations
2016-02-11 16:56 [PULL][PATCH 0/9] GFP_NOFS flags cleanup, part 2 David Sterba
` (6 preceding siblings ...)
2016-02-11 16:57 ` [PATCH 7/9] btrfs: device add and remove: " David Sterba
@ 2016-02-11 16:57 ` David Sterba
2016-02-11 16:57 ` [PATCH 9/9] btrfs: switch to kcalloc in btrfs_cmp_data_prepare David Sterba
8 siblings, 0 replies; 10+ messages in thread
From: David Sterba @ 2016-02-11 16:57 UTC (permalink / raw)
To: linux-btrfs; +Cc: David Sterba
We can safely use GFP_KERNEL in the functions called from the ioctl
handlers. Here we can allocate up to 32k so less pressure to the
allocator could help.
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/ioctl.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 952172ca7e45..55440a742594 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2925,8 +2925,8 @@ static int btrfs_cmp_data_prepare(struct inode *src, u64 loff,
* of the array is bounded by len, which is in turn bounded by
* BTRFS_MAX_DEDUPE_LEN.
*/
- src_pgarr = kzalloc(num_pages * sizeof(struct page *), GFP_NOFS);
- dst_pgarr = kzalloc(num_pages * sizeof(struct page *), GFP_NOFS);
+ src_pgarr = kzalloc(num_pages * sizeof(struct page *), GFP_KERNEL);
+ dst_pgarr = kzalloc(num_pages * sizeof(struct page *), GFP_KERNEL);
if (!src_pgarr || !dst_pgarr) {
kfree(src_pgarr);
kfree(dst_pgarr);
--
2.7.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH 9/9] btrfs: switch to kcalloc in btrfs_cmp_data_prepare
2016-02-11 16:56 [PULL][PATCH 0/9] GFP_NOFS flags cleanup, part 2 David Sterba
` (7 preceding siblings ...)
2016-02-11 16:57 ` [PATCH 8/9] btrfs: extent same: use GFP_KERNEL for page array allocations David Sterba
@ 2016-02-11 16:57 ` David Sterba
8 siblings, 0 replies; 10+ messages in thread
From: David Sterba @ 2016-02-11 16:57 UTC (permalink / raw)
To: linux-btrfs; +Cc: David Sterba
Kcalloc is functionally equivalent and does overflow checks.
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/ioctl.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 55440a742594..11dae2a30eb5 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2925,8 +2925,8 @@ static int btrfs_cmp_data_prepare(struct inode *src, u64 loff,
* of the array is bounded by len, which is in turn bounded by
* BTRFS_MAX_DEDUPE_LEN.
*/
- src_pgarr = kzalloc(num_pages * sizeof(struct page *), GFP_KERNEL);
- dst_pgarr = kzalloc(num_pages * sizeof(struct page *), GFP_KERNEL);
+ src_pgarr = kcalloc(num_pages, sizeof(struct page *), GFP_KERNEL);
+ dst_pgarr = kcalloc(num_pages, sizeof(struct page *), GFP_KERNEL);
if (!src_pgarr || !dst_pgarr) {
kfree(src_pgarr);
kfree(dst_pgarr);
--
2.7.1
^ permalink raw reply related [flat|nested] 10+ messages in thread