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bcachefs: Scale down number of writepoints when low on space

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this means we don't have to reserve space for them when calculating
filesystem capacity

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2018-11-04 21:55:35 -05:00
committed by Kent Overstreet
parent 72644db153
commit b092dadd55
9 changed files with 133 additions and 58 deletions
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11
fs/bcachefs/alloc_foreground.h
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@ -91,15 +91,6 @@ void bch2_alloc_sectors_done(struct bch_fs *, struct write_point *);
void bch2_writepoint_stop(struct bch_fs *, struct bch_dev *,
struct write_point *);
static inline struct hlist_head *writepoint_hash(struct bch_fs *c,
unsigned long write_point)
{
unsigned hash =
hash_long(write_point, ilog2(ARRAY_SIZE(c->write_points_hash)));
return &c->write_points_hash[hash];
}
static inline struct write_point_specifier writepoint_hashed(unsigned long v)
{
return (struct write_point_specifier) { .v = v | 1 };
@ -117,4 +108,6 @@ static inline void writepoint_init(struct write_point *wp,
wp->type = type;
}
void bch2_fs_allocator_foreground_init(struct bch_fs *);
#endif /* _BCACHEFS_ALLOC_FOREGROUND_H */