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bcachefs: Improve want_cached_ptr()

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If promote target isn't set, rebalance should still leave a cached copy
on the faster device.

Fall back to foreground_target if it's set, or allow a cached copy on
any device if neither are set.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2025-05-04 15:01:34 -04:00
parent df2e19a883
commit 844f766e02
1 changed files with 3 additions and 2 deletions
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5
fs/bcachefs/extents.c
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@ -1056,8 +1056,9 @@ bch2_extent_has_ptr(struct bkey_s_c k1, struct extent_ptr_decoded p1, struct bke
static bool want_cached_ptr(struct bch_fs *c, struct bch_io_opts *opts,
struct bch_extent_ptr *ptr)
{
if (!opts->promote_target ||
!bch2_dev_in_target(c, ptr->dev, opts->promote_target))
unsigned target = opts->promote_target ?: opts->foreground_target;
if (target && !bch2_dev_in_target(c, ptr->dev, target))
return false;
struct bch_dev *ca = bch2_dev_rcu_noerror(c, ptr->dev);