Let's reduce the complexity of mixed use of rb_tree in victim_entry from
extent_cache and discard_cmd.
This should fix arm32 memory alignment issue caused by shared rb_entry.
[struct victim_entry] [struct rb_entry]
[0] struct rb_node rb_node; [0] struct rb_node rb_node;
union {
struct {
unsigned int ofs;
unsigned int len;
};
[16] unsigned long long mtime; [12] unsigned long long key;
} __packed;
Cc: <[email protected]>
Fixes: 093749e296e2 ("f2fs: support age threshold based garbage collection")
Signed-off-by: Jaegeuk Kim <[email protected]>
---
fs/f2fs/extent_cache.c | 36 +-------------------
fs/f2fs/f2fs.h | 15 ++-------
fs/f2fs/gc.c | 74 ++++++++++++++++++++++++++++++++++--------
fs/f2fs/gc.h | 14 ++------
fs/f2fs/segment.c | 4 +--
5 files changed, 68 insertions(+), 75 deletions(-)
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c
index 28b12553f2b3..d1aa4609ca6b 100644
--- a/fs/f2fs/extent_cache.c
+++ b/fs/f2fs/extent_cache.c
@@ -204,29 +204,6 @@ struct rb_entry *f2fs_lookup_rb_tree(struct rb_root_cached *root,
return re;
}
-struct rb_node **f2fs_lookup_rb_tree_ext(struct f2fs_sb_info *sbi,
- struct rb_root_cached *root,
- struct rb_node **parent,
- unsigned long long key, bool *leftmost)
-{
- struct rb_node **p = &root->rb_root.rb_node;
- struct rb_entry *re;
-
- while (*p) {
- *parent = *p;
- re = rb_entry(*parent, struct rb_entry, rb_node);
-
- if (key < re->key) {
- p = &(*p)->rb_left;
- } else {
- p = &(*p)->rb_right;
- *leftmost = false;
- }
- }
-
- return p;
-}
-
struct rb_node **f2fs_lookup_rb_tree_for_insert(struct f2fs_sb_info *sbi,
struct rb_root_cached *root,
struct rb_node **parent,
@@ -335,7 +312,7 @@ struct rb_entry *f2fs_lookup_rb_tree_ret(struct rb_root_cached *root,
}
bool f2fs_check_rb_tree_consistence(struct f2fs_sb_info *sbi,
- struct rb_root_cached *root, bool check_key)
+ struct rb_root_cached *root)
{
#ifdef CONFIG_F2FS_CHECK_FS
struct rb_node *cur = rb_first_cached(root), *next;
@@ -352,23 +329,12 @@ bool f2fs_check_rb_tree_consistence(struct f2fs_sb_info *sbi,
cur_re = rb_entry(cur, struct rb_entry, rb_node);
next_re = rb_entry(next, struct rb_entry, rb_node);
- if (check_key) {
- if (cur_re->key > next_re->key) {
- f2fs_info(sbi, "inconsistent rbtree, "
- "cur(%llu) next(%llu)",
- cur_re->key, next_re->key);
- return false;
- }
- goto next;
- }
-
if (cur_re->ofs + cur_re->len > next_re->ofs) {
f2fs_info(sbi, "inconsistent rbtree, cur(%u, %u) next(%u, %u)",
cur_re->ofs, cur_re->len,
next_re->ofs, next_re->len);
return false;
}
-next:
cur = next;
}
#endif
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 9c3ddebd28e3..9396549e112d 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -630,13 +630,8 @@ enum extent_type {
struct rb_entry {
struct rb_node rb_node; /* rb node located in rb-tree */
- union {
- struct {
- unsigned int ofs; /* start offset of the entry */
- unsigned int len; /* length of the entry */
- };
- unsigned long long key; /* 64-bits key */
- } __packed;
+ unsigned int ofs; /* start offset of the entry */
+ unsigned int len; /* length of the entry */
};
struct extent_info {
@@ -4139,10 +4134,6 @@ void f2fs_leave_shrinker(struct f2fs_sb_info *sbi);
bool sanity_check_extent_cache(struct inode *inode);
struct rb_entry *f2fs_lookup_rb_tree(struct rb_root_cached *root,
struct rb_entry *cached_re, unsigned int ofs);
-struct rb_node **f2fs_lookup_rb_tree_ext(struct f2fs_sb_info *sbi,
- struct rb_root_cached *root,
- struct rb_node **parent,
- unsigned long long key, bool *left_most);
struct rb_node **f2fs_lookup_rb_tree_for_insert(struct f2fs_sb_info *sbi,
struct rb_root_cached *root,
struct rb_node **parent,
@@ -4153,7 +4144,7 @@ struct rb_entry *f2fs_lookup_rb_tree_ret(struct rb_root_cached *root,
struct rb_node ***insert_p, struct rb_node **insert_parent,
bool force, bool *leftmost);
bool f2fs_check_rb_tree_consistence(struct f2fs_sb_info *sbi,
- struct rb_root_cached *root, bool check_key);
+ struct rb_root_cached *root);
void f2fs_init_extent_tree(struct inode *inode);
void f2fs_drop_extent_tree(struct inode *inode);
void f2fs_destroy_extent_node(struct inode *inode);
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 292a17d62f56..19a6d0c54581 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -398,8 +398,7 @@ static struct victim_entry *attach_victim_entry(struct f2fs_sb_info *sbi,
struct atgc_management *am = &sbi->am;
struct victim_entry *ve;
- ve = f2fs_kmem_cache_alloc(victim_entry_slab,
- GFP_NOFS, true, NULL);
+ ve = f2fs_kmem_cache_alloc(victim_entry_slab, GFP_NOFS, true, NULL);
ve->mtime = mtime;
ve->segno = segno;
@@ -414,6 +413,29 @@ static struct victim_entry *attach_victim_entry(struct f2fs_sb_info *sbi,
return ve;
}
+static struct rb_node **f2fs_lookup_rb_tree_ext(struct f2fs_sb_info *sbi,
+ struct rb_root_cached *root,
+ struct rb_node **parent,
+ unsigned long long mtime, bool *leftmost)
+{
+ struct rb_node **p = &root->rb_root.rb_node;
+ struct victim_entry *ve;
+
+ while (*p) {
+ *parent = *p;
+ ve = rb_entry(*parent, struct victim_entry, rb_node);
+
+ if (mtime < ve->mtime) {
+ p = &(*p)->rb_left;
+ } else {
+ p = &(*p)->rb_right;
+ *leftmost = false;
+ }
+ }
+
+ return p;
+}
+
static void insert_victim_entry(struct f2fs_sb_info *sbi,
unsigned long long mtime, unsigned int segno)
{
@@ -481,7 +503,6 @@ static void atgc_lookup_victim(struct f2fs_sb_info *sbi,
struct atgc_management *am = &sbi->am;
struct rb_root_cached *root = &am->root;
struct rb_node *node;
- struct rb_entry *re;
struct victim_entry *ve;
unsigned long long total_time;
unsigned long long age, u, accu;
@@ -508,12 +529,10 @@ static void atgc_lookup_victim(struct f2fs_sb_info *sbi,
node = rb_first_cached(root);
next:
- re = rb_entry_safe(node, struct rb_entry, rb_node);
- if (!re)
+ ve = rb_entry_safe(node, struct victim_entry, rb_node);
+ if (!ve)
return;
- ve = (struct victim_entry *)re;
-
if (ve->mtime >= max_mtime || ve->mtime < min_mtime)
goto skip;
@@ -556,7 +575,6 @@ static void atssr_lookup_victim(struct f2fs_sb_info *sbi,
struct sit_info *sit_i = SIT_I(sbi);
struct atgc_management *am = &sbi->am;
struct rb_node *node;
- struct rb_entry *re;
struct victim_entry *ve;
unsigned long long age;
unsigned long long max_mtime = sit_i->dirty_max_mtime;
@@ -576,15 +594,13 @@ static void atssr_lookup_victim(struct f2fs_sb_info *sbi,
next_stage:
node = lookup_central_victim(sbi, p);
next_node:
- re = rb_entry_safe(node, struct rb_entry, rb_node);
- if (!re) {
+ ve = rb_entry_safe(node, struct victim_entry, rb_node);
+ if (!ve) {
if (stage == 0)
goto skip_stage;
return;
}
- ve = (struct victim_entry *)re;
-
if (ve->mtime >= max_mtime || ve->mtime < min_mtime)
goto skip_node;
@@ -623,11 +639,41 @@ static void atssr_lookup_victim(struct f2fs_sb_info *sbi,
goto next_stage;
}
}
+
+static bool f2fs_check_victim_tree(struct f2fs_sb_info *sbi,
+ struct rb_root_cached *root)
+{
+#ifdef CONFIG_F2FS_CHECK_FS
+ struct rb_node *cur = rb_first_cached(root), *next;
+ struct victim_entry *cur_ve, *next_ve;
+
+ if (!cur)
+ return true;
+
+ while (cur) {
+ next = rb_next(cur);
+ if (!next)
+ return true;
+
+ cur_ve = rb_entry(cur, struct victim_entry, rb_node);
+ next_ve = rb_entry(next, struct victim_entry, rb_node);
+
+ if (cur_ve->mtime > next_ve->mtime) {
+ f2fs_info(sbi, "broken victim_rbtree, "
+ "cur_mtime(%llu) next_mtime(%llu)",
+ cur_ve->mtime, next_ve->mtime);
+ return false;
+ }
+ cur = next;
+ }
+#endif
+ return true;
+}
+
static void lookup_victim_by_age(struct f2fs_sb_info *sbi,
struct victim_sel_policy *p)
{
- f2fs_bug_on(sbi, !f2fs_check_rb_tree_consistence(sbi,
- &sbi->am.root, true));
+ f2fs_bug_on(sbi, !f2fs_check_victim_tree(sbi, &sbi->am.root));
if (p->gc_mode == GC_AT)
atgc_lookup_victim(sbi, p);
diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h
index 15bd1d680f67..5ad6ac63e13f 100644
--- a/fs/f2fs/gc.h
+++ b/fs/f2fs/gc.h
@@ -55,20 +55,10 @@ struct gc_inode_list {
struct radix_tree_root iroot;
};
-struct victim_info {
- unsigned long long mtime; /* mtime of section */
- unsigned int segno; /* section No. */
-};
-
struct victim_entry {
struct rb_node rb_node; /* rb node located in rb-tree */
- union {
- struct {
- unsigned long long mtime; /* mtime of section */
- unsigned int segno; /* segment No. */
- };
- struct victim_info vi; /* victim info */
- };
+ unsigned long long mtime; /* mtime of section */
+ unsigned int segno; /* segment No. */
struct list_head list;
};
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 227e25836173..e98a12e8dca1 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1478,7 +1478,7 @@ static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
goto next;
if (unlikely(dcc->rbtree_check))
f2fs_bug_on(sbi, !f2fs_check_rb_tree_consistence(sbi,
- &dcc->root, false));
+ &dcc->root));
blk_start_plug(&plug);
list_for_each_entry_safe(dc, tmp, pend_list, list) {
f2fs_bug_on(sbi, dc->state != D_PREP);
@@ -2965,7 +2965,7 @@ static unsigned int __issue_discard_cmd_range(struct f2fs_sb_info *sbi,
mutex_lock(&dcc->cmd_lock);
if (unlikely(dcc->rbtree_check))
f2fs_bug_on(sbi, !f2fs_check_rb_tree_consistence(sbi,
- &dcc->root, false));
+ &dcc->root));
dc = (struct discard_cmd *)f2fs_lookup_rb_tree_ret(&dcc->root,
NULL, start,
--
2.40.0.rc1.284.g88254d51c5-goog
This is a last part to remove the memory sharing for rb_tree in extent_cache.
This should also fix arm32 memory alignment issue.
[struct extent_node] [struct rb_entry]
[0] struct rb_node rb_node; [0] struct rb_node rb_node;
union { union {
struct { struct {
[16] unsigned int fofs; [12] unsigned int ofs;
unsigned int len; unsigned int len;
};
unsigned long long key;
} __packed;
Cc: <[email protected]>
Fixes: 13054c548a1c ("f2fs: introduce infra macro and data structure of rb-tree extent cache")
Signed-off-by: Jaegeuk Kim <[email protected]>
---
fs/f2fs/extent_cache.c | 177 +++++++++++++++++------------------------
fs/f2fs/f2fs.h | 6 --
2 files changed, 71 insertions(+), 112 deletions(-)
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c
index 5c206f941aac..9a8153895d20 100644
--- a/fs/f2fs/extent_cache.c
+++ b/fs/f2fs/extent_cache.c
@@ -161,95 +161,52 @@ static bool __is_front_mergeable(struct extent_info *cur,
return __is_extent_mergeable(cur, front, type);
}
-static struct rb_entry *__lookup_rb_tree_fast(struct rb_entry *cached_re,
- unsigned int ofs)
-{
- if (cached_re) {
- if (cached_re->ofs <= ofs &&
- cached_re->ofs + cached_re->len > ofs) {
- return cached_re;
- }
- }
- return NULL;
-}
-
-static struct rb_entry *__lookup_rb_tree_slow(struct rb_root_cached *root,
- unsigned int ofs)
+static struct extent_node *__lookup_extent_node(struct rb_root_cached *root,
+ struct extent_node *cached_en, unsigned int fofs)
{
struct rb_node *node = root->rb_root.rb_node;
- struct rb_entry *re;
+ struct extent_node *en;
+
+ /* check a cached entry */
+ if (cached_en && cached_en->ei.fofs <= fofs &&
+ cached_en->ei.fofs + cached_en->ei.len > fofs)
+ return cached_en;
+ /* check rb_tree */
while (node) {
- re = rb_entry(node, struct rb_entry, rb_node);
+ en = rb_entry(node, struct extent_node, rb_node);
- if (ofs < re->ofs)
+ if (fofs < en->ei.fofs)
node = node->rb_left;
- else if (ofs >= re->ofs + re->len)
+ else if (fofs >= en->ei.fofs + en->ei.len)
node = node->rb_right;
else
- return re;
+ return en;
}
return NULL;
}
-static struct rb_entry *f2fs_lookup_rb_tree(struct rb_root_cached *root,
- struct rb_entry *cached_re, unsigned int ofs)
-{
- struct rb_entry *re;
-
- re = __lookup_rb_tree_fast(cached_re, ofs);
- if (!re)
- return __lookup_rb_tree_slow(root, ofs);
-
- return re;
-}
-
-static struct rb_node **f2fs_lookup_rb_tree_for_insert(struct f2fs_sb_info *sbi,
- struct rb_root_cached *root,
- struct rb_node **parent,
- unsigned int ofs, bool *leftmost)
-{
- struct rb_node **p = &root->rb_root.rb_node;
- struct rb_entry *re;
-
- while (*p) {
- *parent = *p;
- re = rb_entry(*parent, struct rb_entry, rb_node);
-
- if (ofs < re->ofs) {
- p = &(*p)->rb_left;
- } else if (ofs >= re->ofs + re->len) {
- p = &(*p)->rb_right;
- *leftmost = false;
- } else {
- f2fs_bug_on(sbi, 1);
- }
- }
-
- return p;
-}
-
/*
- * lookup rb entry in position of @ofs in rb-tree,
+ * lookup rb entry in position of @fofs in rb-tree,
* if hit, return the entry, otherwise, return NULL
- * @prev_ex: extent before ofs
- * @next_ex: extent after ofs
- * @insert_p: insert point for new extent at ofs
+ * @prev_ex: extent before fofs
+ * @next_ex: extent after fofs
+ * @insert_p: insert point for new extent at fofs
* in order to simplify the insertion after.
* tree must stay unchanged between lookup and insertion.
*/
-static struct rb_entry *f2fs_lookup_rb_tree_ret(struct rb_root_cached *root,
- struct rb_entry *cached_re,
- unsigned int ofs,
- struct rb_entry **prev_entry,
- struct rb_entry **next_entry,
+static struct extent_node *__lookup_extent_node_ret(struct rb_root_cached *root,
+ struct extent_node *cached_en,
+ unsigned int fofs,
+ struct extent_node **prev_entry,
+ struct extent_node **next_entry,
struct rb_node ***insert_p,
struct rb_node **insert_parent,
- bool force, bool *leftmost)
+ bool *leftmost)
{
struct rb_node **pnode = &root->rb_root.rb_node;
struct rb_node *parent = NULL, *tmp_node;
- struct rb_entry *re = cached_re;
+ struct extent_node *en = cached_en;
*insert_p = NULL;
*insert_parent = NULL;
@@ -259,24 +216,20 @@ static struct rb_entry *f2fs_lookup_rb_tree_ret(struct rb_root_cached *root,
if (RB_EMPTY_ROOT(&root->rb_root))
return NULL;
- if (re) {
- if (re->ofs <= ofs && re->ofs + re->len > ofs)
- goto lookup_neighbors;
- }
+ if (en && en->ei.fofs <= fofs && en->ei.fofs + en->ei.len > fofs)
+ goto lookup_neighbors;
- if (leftmost)
- *leftmost = true;
+ *leftmost = true;
while (*pnode) {
parent = *pnode;
- re = rb_entry(*pnode, struct rb_entry, rb_node);
+ en = rb_entry(*pnode, struct extent_node, rb_node);
- if (ofs < re->ofs) {
+ if (fofs < en->ei.fofs) {
pnode = &(*pnode)->rb_left;
- } else if (ofs >= re->ofs + re->len) {
+ } else if (fofs >= en->ei.fofs + en->ei.len) {
pnode = &(*pnode)->rb_right;
- if (leftmost)
- *leftmost = false;
+ *leftmost = false;
} else {
goto lookup_neighbors;
}
@@ -285,30 +238,32 @@ static struct rb_entry *f2fs_lookup_rb_tree_ret(struct rb_root_cached *root,
*insert_p = pnode;
*insert_parent = parent;
- re = rb_entry(parent, struct rb_entry, rb_node);
+ en = rb_entry(parent, struct extent_node, rb_node);
tmp_node = parent;
- if (parent && ofs > re->ofs)
+ if (parent && fofs > en->ei.fofs)
tmp_node = rb_next(parent);
- *next_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node);
+ *next_entry = rb_entry_safe(tmp_node, struct extent_node, rb_node);
tmp_node = parent;
- if (parent && ofs < re->ofs)
+ if (parent && fofs < en->ei.fofs)
tmp_node = rb_prev(parent);
- *prev_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node);
+ *prev_entry = rb_entry_safe(tmp_node, struct extent_node, rb_node);
return NULL;
lookup_neighbors:
- if (ofs == re->ofs || force) {
+ if (fofs == en->ei.fofs) {
/* lookup prev node for merging backward later */
- tmp_node = rb_prev(&re->rb_node);
- *prev_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node);
+ tmp_node = rb_prev(&en->rb_node);
+ *prev_entry = rb_entry_safe(tmp_node,
+ struct extent_node, rb_node);
}
- if (ofs == re->ofs + re->len - 1 || force) {
+ if (fofs == en->ei.fofs + en->ei.len - 1) {
/* lookup next node for merging frontward later */
- tmp_node = rb_next(&re->rb_node);
- *next_entry = rb_entry_safe(tmp_node, struct rb_entry, rb_node);
+ tmp_node = rb_next(&en->rb_node);
+ *next_entry = rb_entry_safe(tmp_node,
+ struct extent_node, rb_node);
}
- return re;
+ return en;
}
static struct kmem_cache *extent_tree_slab;
@@ -523,8 +478,7 @@ static bool __lookup_extent_tree(struct inode *inode, pgoff_t pgofs,
goto out;
}
- en = (struct extent_node *)f2fs_lookup_rb_tree(&et->root,
- (struct rb_entry *)et->cached_en, pgofs);
+ en = __lookup_extent_node(&et->root, et->cached_en, pgofs);
if (!en)
goto out;
@@ -598,7 +552,7 @@ static struct extent_node *__insert_extent_tree(struct f2fs_sb_info *sbi,
bool leftmost)
{
struct extent_tree_info *eti = &sbi->extent_tree[et->type];
- struct rb_node **p;
+ struct rb_node **p = &et->root.rb_root.rb_node;
struct rb_node *parent = NULL;
struct extent_node *en = NULL;
@@ -610,8 +564,21 @@ static struct extent_node *__insert_extent_tree(struct f2fs_sb_info *sbi,
leftmost = true;
- p = f2fs_lookup_rb_tree_for_insert(sbi, &et->root, &parent,
- ei->fofs, &leftmost);
+ /* look up extent_node in the rb tree */
+ while (*p) {
+ parent = *p;
+ en = rb_entry(parent, struct extent_node, rb_node);
+
+ if (ei->fofs < en->ei.fofs) {
+ p = &(*p)->rb_left;
+ } else if (ei->fofs >= en->ei.fofs + en->ei.len) {
+ p = &(*p)->rb_right;
+ leftmost = false;
+ } else {
+ f2fs_bug_on(sbi, 1);
+ }
+ }
+
do_insert:
en = __attach_extent_node(sbi, et, ei, parent, p, leftmost);
if (!en)
@@ -670,11 +637,10 @@ static void __update_extent_tree_range(struct inode *inode,
}
/* 1. lookup first extent node in range [fofs, fofs + len - 1] */
- en = (struct extent_node *)f2fs_lookup_rb_tree_ret(&et->root,
- (struct rb_entry *)et->cached_en, fofs,
- (struct rb_entry **)&prev_en,
- (struct rb_entry **)&next_en,
- &insert_p, &insert_parent, false,
+ en = __lookup_extent_node_ret(&et->root,
+ et->cached_en, fofs,
+ &prev_en, &next_en,
+ &insert_p, &insert_parent,
&leftmost);
if (!en)
en = next_en;
@@ -812,12 +778,11 @@ void f2fs_update_read_extent_tree_range_compressed(struct inode *inode,
write_lock(&et->lock);
- en = (struct extent_node *)f2fs_lookup_rb_tree_ret(&et->root,
- (struct rb_entry *)et->cached_en, fofs,
- (struct rb_entry **)&prev_en,
- (struct rb_entry **)&next_en,
- &insert_p, &insert_parent, false,
- &leftmost);
+ en = __lookup_extent_node_ret(&et->root,
+ et->cached_en, fofs,
+ &prev_en, &next_en,
+ &insert_p, &insert_parent,
+ &leftmost);
if (en)
goto unlock_out;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 6e04fea9c34f..90a67feddcdc 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -620,12 +620,6 @@ enum extent_type {
NR_EXTENT_CACHES,
};
-struct rb_entry {
- struct rb_node rb_node; /* rb node located in rb-tree */
- unsigned int ofs; /* start offset of the entry */
- unsigned int len; /* length of the entry */
-};
-
struct extent_info {
unsigned int fofs; /* start offset in a file */
unsigned int len; /* length of the extent */
--
2.40.0.rc1.284.g88254d51c5-goog
On Fri, Mar 10, 2023 at 01:04:52PM -0800, Jaegeuk Kim wrote:
> Let's reduce the complexity of mixed use of rb_tree in victim_entry from
> extent_cache and discard_cmd.
>
> This should fix arm32 memory alignment issue caused by shared rb_entry.
>
> [struct victim_entry] [struct rb_entry]
> [0] struct rb_node rb_node; [0] struct rb_node rb_node;
> union {
> struct {
> unsigned int ofs;
> unsigned int len;
> };
> [16] unsigned long long mtime; [12] unsigned long long key;
> } __packed;
>
> Cc: <[email protected]>
> Fixes: 093749e296e2 ("f2fs: support age threshold based garbage collection")
> Signed-off-by: Jaegeuk Kim <[email protected]>
Thanks for fixing this properly. It looks much better than the weird type
punning that was being done before...
> +static struct rb_node **f2fs_lookup_rb_tree_ext(struct f2fs_sb_info *sbi,
> + struct rb_root_cached *root,
> + struct rb_node **parent,
> + unsigned long long mtime, bool *leftmost)
Call this f2fs_lookup_victim_entry()?
> +static bool f2fs_check_victim_tree(struct f2fs_sb_info *sbi,
> + struct rb_root_cached *root)
> +{
> +#ifdef CONFIG_F2FS_CHECK_FS
> + struct rb_node *cur = rb_first_cached(root), *next;
> + struct victim_entry *cur_ve, *next_ve;
> +
> + if (!cur)
> + return true;
> +
> + while (cur) {
The !cur check is redundant.
- Eric
Hello:
This series was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <[email protected]>:
On Fri, 10 Mar 2023 13:04:52 -0800 you wrote:
> Let's reduce the complexity of mixed use of rb_tree in victim_entry from
> extent_cache and discard_cmd.
>
> This should fix arm32 memory alignment issue caused by shared rb_entry.
>
> [struct victim_entry] [struct rb_entry]
> [0] struct rb_node rb_node; [0] struct rb_node rb_node;
> union {
> struct {
> unsigned int ofs;
> unsigned int len;
> };
> [16] unsigned long long mtime; [12] unsigned long long key;
> } __packed;
>
> [...]
Here is the summary with links:
- [f2fs-dev,1/3] f2fs: factor out victim_entry usage from general rb_tree use
(no matching commit)
- [f2fs-dev,2/3] f2fs: factor out discard_cmd usage from general rb_tree use
(no matching commit)
- [f2fs-dev,3/3] f2fs: remove entire rb_entry sharing
https://git.kernel.org/jaegeuk/f2fs/c/6b40bc364c10
You are awesome, thank you!
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