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bcachefs: Don't use rep movsq for small memcopies

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2019-10-22 17:35:35 -04:00
committed by Kent Overstreet
parent 7f9473d171
commit b8098f36dd
3 changed files with 22 additions and 4 deletions
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4
fs/bcachefs/bkey.h
View File

@@ -95,8 +95,8 @@ do { \
(u64 *) (_dst) < (u64 *) (_src) + \
((struct bkey *) (_src))->u64s); \
\
__memmove_u64s_down((_dst), (_src), \
((struct bkey *) (_src))->u64s); \
memcpy_u64s_small((_dst), (_src), \
((struct bkey *) (_src))->u64s); \
} while (0)
struct btree;

4
fs/bcachefs/extents.c
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@@ -1457,8 +1457,8 @@ static inline void __extent_entry_insert(struct bkey_i *k,
{
union bch_extent_entry *end = bkey_val_end(bkey_i_to_s(k));
memmove_u64s_up((u64 *) dst + extent_entry_u64s(new),
dst, (u64 *) end - (u64 *) dst);
memmove_u64s_up_small((u64 *) dst + extent_entry_u64s(new),
dst, (u64 *) end - (u64 *) dst);
k->k.u64s += extent_entry_u64s(new);
memcpy_u64s_small(dst, new, extent_entry_u64s(new));
}

18
fs/bcachefs/util.h
View File

@@ -593,6 +593,24 @@ static inline void memmove_u64s_down(void *dst, const void *src,
__memmove_u64s_down(dst, src, u64s);
}
static inline void __memmove_u64s_up_small(void *_dst, const void *_src,
unsigned u64s)
{
u64 *dst = (u64 *) _dst + u64s;
u64 *src = (u64 *) _src + u64s;
while (u64s--)
*--dst = *--src;
}
static inline void memmove_u64s_up_small(void *dst, const void *src,
unsigned u64s)
{
EBUG_ON(dst < src);
__memmove_u64s_up_small(dst, src, u64s);
}
static inline void __memmove_u64s_up(void *_dst, const void *_src,
unsigned u64s)
{