Two changes from v1.29-notify-2:
1. kmod: fix a latent ring-size compile error. The record struct was
56 bytes with an _pad[6] trailer, which meant
NOTIFY_RING_BYTES / sizeof(record) = 1170 events per ring —
not a power of two, so the BUILD_BUG_ON in notify_setup would
have fired. Bumped _pad to 14 bytes so the record is 64 bytes,
capacity is 1024, and every record is cache-line aligned. Wire
ABI bumped accordingly; no deployed consumers yet.
2. scoutfs-notifyd: rewritten in Go using the standard library
only. Three goroutines (reader / accept / broadcaster) with
channel communication replace the single-thread epoll + ioctl
loop from the C version. Slow-client handling is done by
setting an in-the-past write deadline; the broadcaster drops
clients whose kernel send buffer is full.
Packaging changes: utils/Makefile now invokes "go build" with
CGO_ENABLED=0 and GOPROXY=off; utils/scoutfs-utils.spec.in adds
BuildRequires: golang >= 1.21.
William Gill
25a2182c45