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Message-ID: <D256A968.116805%andreas.dilger@intel.com>
Date: Wed, 28 Oct 2015 22:34:21 +0000
From: "Dilger, Andreas" <andreas.dilger@...el.com>
To: James Simmons <jsimmons@...radead.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
"Drokin, Oleg" <oleg.drokin@...el.com>
CC: James Simmons <uja.ornl@...oo.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
"lustre-devel@...ts.lustre.org" <lustre-devel@...ts.lustre.org>
Subject: Re: [lustre-devel] [PATCH 08/10] staging: lustre: remove white
space in libcfs_hash.h
On 2015/10/28, 10:54, "lustre-devel on behalf of James Simmons"
<lustre-devel-bounces@...ts.lustre.org on behalf of
jsimmons@...radead.org> wrote:
>From: James Simmons <uja.ornl@...oo.com>
>
>Cleanup all the unneeded white space in libcfs_hash.h.
>
>Signed-off-by: James Simmons <jsimmons@...radead.org>
Minor note - it would be better to keep these two email addresses
consistent.
>struct cfs_hash_bd {
>- struct cfs_hash_bucket *bd_bucket; /**< address of bucket */
>- unsigned int bd_offset; /**< offset in bucket */
>+ /**< address of bucket */
>+ struct cfs_hash_bucket *bd_bucket;
>+ /**< offset in bucket */
>+ unsigned int bd_offset;
> };
The "/**< ... */" marker means "the field to the left", but if you are
moving these to the line before the field you should just use "/* ... */".
Cheers, Andreas
>
>-#define CFS_HASH_NAME_LEN 16 /**< default name length */
>-#define CFS_HASH_BIGNAME_LEN 64 /**< bigname for param tree */
>+#define CFS_HASH_NAME_LEN 16 /**< default name length */
>+#define CFS_HASH_BIGNAME_LEN 64 /**< bigname for param tree */
>
>-#define CFS_HASH_BKT_BITS 3 /**< default bits of bucket */
>-#define CFS_HASH_BITS_MAX 30 /**< max bits of bucket */
>-#define CFS_HASH_BITS_MIN CFS_HASH_BKT_BITS
>+#define CFS_HASH_BKT_BITS 3 /**< default bits of bucket */
>+#define CFS_HASH_BITS_MAX 30 /**< max bits of bucket */
>+#define CFS_HASH_BITS_MIN CFS_HASH_BKT_BITS
>
> /**
> * common hash attributes.
>@@ -133,41 +129,41 @@ enum cfs_hash_tag {
> */
> CFS_HASH_NO_LOCK = 1 << 0,
> /** no bucket lock, use one spinlock to protect the whole hash */
>- CFS_HASH_NO_BKTLOCK = 1 << 1,
>+ CFS_HASH_NO_BKTLOCK = 1 << 1,
> /** rwlock to protect bucket */
>- CFS_HASH_RW_BKTLOCK = 1 << 2,
>+ CFS_HASH_RW_BKTLOCK = 1 << 2,
> /** spinlock to protect bucket */
>- CFS_HASH_SPIN_BKTLOCK = 1 << 3,
>+ CFS_HASH_SPIN_BKTLOCK = 1 << 3,
> /** always add new item to tail */
>- CFS_HASH_ADD_TAIL = 1 << 4,
>+ CFS_HASH_ADD_TAIL = 1 << 4,
> /** hash-table doesn't have refcount on item */
>- CFS_HASH_NO_ITEMREF = 1 << 5,
>+ CFS_HASH_NO_ITEMREF = 1 << 5,
> /** big name for param-tree */
> CFS_HASH_BIGNAME = 1 << 6,
> /** track global count */
> CFS_HASH_COUNTER = 1 << 7,
> /** rehash item by new key */
>- CFS_HASH_REHASH_KEY = 1 << 8,
>+ CFS_HASH_REHASH_KEY = 1 << 8,
> /** Enable dynamic hash resizing */
>- CFS_HASH_REHASH = 1 << 9,
>+ CFS_HASH_REHASH = 1 << 9,
> /** can shrink hash-size */
>- CFS_HASH_SHRINK = 1 << 10,
>+ CFS_HASH_SHRINK = 1 << 10,
> /** assert hash is empty on exit */
>- CFS_HASH_ASSERT_EMPTY = 1 << 11,
>+ CFS_HASH_ASSERT_EMPTY = 1 << 11,
> /** record hlist depth */
>- CFS_HASH_DEPTH = 1 << 12,
>+ CFS_HASH_DEPTH = 1 << 12,
> /**
> * rehash is always scheduled in a different thread, so current
> * change on hash table is non-blocking
> */
>- CFS_HASH_NBLK_CHANGE = 1 << 13,
>+ CFS_HASH_NBLK_CHANGE = 1 << 13,
> /** NB, we typed hs_flags as __u16, please change it
> * if you need to extend >=16 flags */
> };
>
> /** most used attributes */
>-#define CFS_HASH_DEFAULT (CFS_HASH_RW_BKTLOCK | \
>- CFS_HASH_COUNTER | CFS_HASH_REHASH)
>+#define CFS_HASH_DEFAULT (CFS_HASH_RW_BKTLOCK | \
>+ CFS_HASH_COUNTER | CFS_HASH_REHASH)
>
> /**
> * cfs_hash is a hash-table implementation for general purpose, it can
>support:
>@@ -211,7 +207,7 @@ enum cfs_hash_tag {
> struct cfs_hash {
> /** serialize with rehash, or serialize all operations if
> * the hash-table has CFS_HASH_NO_BKTLOCK */
>- union cfs_hash_lock hs_lock;
>+ union cfs_hash_lock hs_lock;
> /** hash operations */
> struct cfs_hash_ops *hs_ops;
> /** hash lock operations */
>@@ -219,57 +215,57 @@ struct cfs_hash {
> /** hash list operations */
> struct cfs_hash_hlist_ops *hs_hops;
> /** hash buckets-table */
>- struct cfs_hash_bucket **hs_buckets;
>+ struct cfs_hash_bucket **hs_buckets;
> /** total number of items on this hash-table */
>- atomic_t hs_count;
>+ atomic_t hs_count;
> /** hash flags, see cfs_hash_tag for detail */
>- __u16 hs_flags;
>+ __u16 hs_flags;
> /** # of extra-bytes for bucket, for user saving extended attributes */
>- __u16 hs_extra_bytes;
>+ __u16 hs_extra_bytes;
> /** wants to iterate */
>- __u8 hs_iterating;
>+ __u8 hs_iterating;
> /** hash-table is dying */
>- __u8 hs_exiting;
>+ __u8 hs_exiting;
> /** current hash bits */
>- __u8 hs_cur_bits;
>+ __u8 hs_cur_bits;
> /** min hash bits */
>- __u8 hs_min_bits;
>+ __u8 hs_min_bits;
> /** max hash bits */
>- __u8 hs_max_bits;
>+ __u8 hs_max_bits;
> /** bits for rehash */
>- __u8 hs_rehash_bits;
>+ __u8 hs_rehash_bits;
> /** bits for each bucket */
>- __u8 hs_bkt_bits;
>+ __u8 hs_bkt_bits;
> /** resize min threshold */
>- __u16 hs_min_theta;
>+ __u16 hs_min_theta;
> /** resize max threshold */
>- __u16 hs_max_theta;
>+ __u16 hs_max_theta;
> /** resize count */
>- __u32 hs_rehash_count;
>+ __u32 hs_rehash_count;
> /** # of iterators (caller of cfs_hash_for_each_*) */
>- __u32 hs_iterators;
>+ __u32 hs_iterators;
> /** rehash workitem */
>- cfs_workitem_t hs_rehash_wi;
>+ cfs_workitem_t hs_rehash_wi;
> /** refcount on this hash table */
>- atomic_t hs_refcount;
>+ atomic_t hs_refcount;
> /** rehash buckets-table */
>- struct cfs_hash_bucket **hs_rehash_buckets;
>+ struct cfs_hash_bucket **hs_rehash_buckets;
> #if CFS_HASH_DEBUG_LEVEL >= CFS_HASH_DEBUG_1
> /** serialize debug members */
> spinlock_t hs_dep_lock;
> /** max depth */
>- unsigned int hs_dep_max;
>+ unsigned int hs_dep_max;
> /** id of the deepest bucket */
>- unsigned int hs_dep_bkt;
>+ unsigned int hs_dep_bkt;
> /** offset in the deepest bucket */
>- unsigned int hs_dep_off;
>+ unsigned int hs_dep_off;
> /** bits when we found the max depth */
>- unsigned int hs_dep_bits;
>+ unsigned int hs_dep_bits;
> /** workitem to output max depth */
>- cfs_workitem_t hs_dep_wi;
>+ cfs_workitem_t hs_dep_wi;
> #endif
> /** name of htable */
>- char hs_name[0];
>+ char hs_name[0];
> };
>
> struct cfs_hash_lock_ops {
>@@ -324,11 +320,11 @@ struct cfs_hash_ops {
> };
>
> /** total number of buckets in @hs */
>-#define CFS_HASH_NBKT(hs) \
>+#define CFS_HASH_NBKT(hs) \
> (1U << ((hs)->hs_cur_bits - (hs)->hs_bkt_bits))
>
> /** total number of buckets in @hs while rehashing */
>-#define CFS_HASH_RH_NBKT(hs) \
>+#define CFS_HASH_RH_NBKT(hs) \
> (1U << ((hs)->hs_rehash_bits - (hs)->hs_bkt_bits))
>
> /** number of hlist for in bucket */
>@@ -433,19 +429,22 @@ cfs_hash_with_nblk_change(struct cfs_hash *hs)
>
> static inline int
> cfs_hash_is_exiting(struct cfs_hash *hs)
>-{ /* cfs_hash_destroy is called */
>+{
>+ /* cfs_hash_destroy is called */
> return hs->hs_exiting;
> }
>
> static inline int
> cfs_hash_is_rehashing(struct cfs_hash *hs)
>-{ /* rehash is launched */
>+{
>+ /* rehash is launched */
> return hs->hs_rehash_bits != 0;
> }
>
> static inline int
> cfs_hash_is_iterating(struct cfs_hash *hs)
>-{ /* someone is calling cfs_hash_for_each_* */
>+{
>+ /* someone is calling cfs_hash_for_each_* */
> return hs->hs_iterating || hs->hs_iterators != 0;
> }
>
>@@ -758,7 +757,7 @@ static inline void
> cfs_hash_bucket_validate(struct cfs_hash *hs, struct cfs_hash_bd *bd,
> struct hlist_node *hnode)
> {
>- struct cfs_hash_bd bds[2];
>+ struct cfs_hash_bd bds[2];
>
> cfs_hash_dual_bd_get(hs, cfs_hash_key(hs, hnode), bds);
> LASSERT(bds[0].bd_bucket == bd->bd_bucket ||
>@@ -777,9 +776,9 @@ cfs_hash_bucket_validate(struct cfs_hash *hs, struct
>cfs_hash_bd *bd,
>
> #endif /* CFS_HASH_DEBUG_LEVEL */
>
>-#define CFS_HASH_THETA_BITS 10
>-#define CFS_HASH_MIN_THETA (1U << (CFS_HASH_THETA_BITS - 1))
>-#define CFS_HASH_MAX_THETA (1U << (CFS_HASH_THETA_BITS + 1))
>+#define CFS_HASH_THETA_BITS 10
>+#define CFS_HASH_MIN_THETA (1U << (CFS_HASH_THETA_BITS - 1))
>+#define CFS_HASH_MAX_THETA (1U << (CFS_HASH_THETA_BITS + 1))
>
> /* Return integer component of theta */
> static inline int __cfs_hash_theta_int(int theta)
>@@ -848,20 +847,20 @@ cfs_hash_u64_hash(const __u64 key, unsigned mask)
> }
>
> /** iterate over all buckets in @bds (array of struct cfs_hash_bd) */
>-#define cfs_hash_for_each_bd(bds, n, i) \
>+#define cfs_hash_for_each_bd(bds, n, i) \
> for (i = 0; i < n && (bds)[i].bd_bucket != NULL; i++)
>
> /** iterate over all buckets of @hs */
>-#define cfs_hash_for_each_bucket(hs, bd, pos) \
>- for (pos = 0; \
>- pos < CFS_HASH_NBKT(hs) && \
>+#define cfs_hash_for_each_bucket(hs, bd, pos) \
>+ for (pos = 0; \
>+ pos < CFS_HASH_NBKT(hs) && \
> ((bd)->bd_bucket = (hs)->hs_buckets[pos]) != NULL; pos++)
>
> /** iterate over all hlist of bucket @bd */
>-#define cfs_hash_bd_for_each_hlist(hs, bd, hlist) \
>- for ((bd)->bd_offset = 0; \
>- (bd)->bd_offset < CFS_HASH_BKT_NHLIST(hs) && \
>- (hlist = cfs_hash_bd_hhead(hs, bd)) != NULL; \
>+#define cfs_hash_bd_for_each_hlist(hs, bd, hlist) \
>+ for ((bd)->bd_offset = 0; \
>+ (bd)->bd_offset < CFS_HASH_BKT_NHLIST(hs) && \
>+ (hlist = cfs_hash_bd_hhead(hs, bd)) != NULL; \
> (bd)->bd_offset++)
>
> /* !__LIBCFS__HASH_H__ */
>--
>1.7.1
>
>_______________________________________________
>lustre-devel mailing list
>lustre-devel@...ts.lustre.org
>http://lists.lustre.org/listinfo.cgi/lustre-devel-lustre.org
>
Cheers, Andreas
--
Andreas Dilger
Lustre Software Architect
Intel High Performance Data Division
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