From: Kent Overstreet Date: Sat, 12 Jul 2025 23:33:12 +0000 (-0400) Subject: bcachefs: Tweak threshold for allocator triggering discards X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=6a1c4323defd18ca732c13d9abf4204ea1a4182f;p=linux-block.git bcachefs: Tweak threshold for allocator triggering discards The allocator path has a "if we're really low on free buckets, check if we should issue discards" - tweak this to also trigger discards if more than 1/128th of the device is in need_discard state. Signed-off-by: Kent Overstreet --- diff --git a/fs/bcachefs/alloc_foreground.c b/fs/bcachefs/alloc_foreground.c index b375ad610acd..b58525ec7b4d 100644 --- a/fs/bcachefs/alloc_foreground.c +++ b/fs/bcachefs/alloc_foreground.c @@ -511,7 +511,8 @@ again: bch2_dev_usage_read_fast(ca, &req->usage); avail = dev_buckets_free(ca, req->usage, req->watermark); - if (req->usage.buckets[BCH_DATA_need_discard] > avail) + if (req->usage.buckets[BCH_DATA_need_discard] > + min(avail, ca->mi.nbuckets >> 7)) bch2_dev_do_discards(ca); if (req->usage.buckets[BCH_DATA_need_gc_gens] > avail)