[Bug 291816] devel/glib20: Add back FAM_ALTBACKEND for Alternate file monitor backend

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 20 Dec 2025 08:09:12 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291816

--- Comment #2 from Ivan Rozhuk <rozhuk.im@gmail.com> ---
(In reply to Gleb Popov from comment #1)
For 100% CPU & hand - few week uptime, multiple open folders in thunar,
including /tmp, + build chromium with WRKDIRPREFIX?=/tmp/ports in make.conf.

To avoid any possible hangs my FAM schedules all add/remove operations via pipe
to separate thread, so window thread never get blocked on open()~s and have
const time to add/del watch to folders any size and any locations (even if it
is a laggy remote share).


For lost notifications - context menu "Create tar.gz from folder" with 2+Gb
folder and watch for resulting file changes. With my FAM it updates info every
2 seconds, with inotify-kqueue - does not update.

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