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The underlying issue seems to be the case when the thread that runs
the IO driver is polling its own tasks, while that happens the IO
driver/poller won't run and thus work stealing won't happen, meaning
that idle and parked threads will keep being parked even if there's
pending work they could do.
A promising solution for tokio is proposed in its issue tracker [0],
but it wasn't yet implemented. So, as stop gap spawn a separate
thread that periodically spawns a no-op ready future in the runtime
which would unpark a worker in the aforementioned case and thus
should break the bogus idleness. Choose a 3s period for that without
any overly elaborate reasons, our main goal is to ensure we accept
incoming connections and 3s is well below a HTTP timeout and leaves
some room for high network latencies while not invoking to much
additional wakeups for systems that are really idling.
[0]: https://github.com/tokio-rs/tokio/issues/4730#issuecomment-1147975074
Link: https://github.com/tokio-rs/tokio/issues/4730
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
not much value in waiting an extra minute, that doesn't really
guarantees better scheduling (as in, less impact on startup).
Dropping that also allows easily to drop the counter by just moving
the sleep to the beginning of the loop.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
now that the man pages are generated from sphinx, not rst2man, they
got access to the conf.py and things like its rst_epilog variable.
Use that to set the correct version in there dynamically
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
rst2man is only good for use in projects that don't use sphinx
already, as there it can help to avoid bringing in the full sphinx
dependencies and be easier to manage (as long as it stay small).
But we already use sphinx, so there's no point in managing the manual
pages in a separate, semi-related way that is quite restricted as we
have no access to sphinx infrastructure like conf.py defined
variables and helpers for things like the current version.
Besides that, we're rather big, so the complexity of sphinx can
shine, e.g., see the diffstat report from switching out rst2man for
sphinx:
22 files changed, 74 insertions(+), 347 deletions(-)
so 273 lines less in total is rather nice.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
In the API we want to iterate over all backup groups
belonging to a particular type at least once, and iterating
through *everything* and simply "skipping" over every single
entry from another type makes no sense given that the groups
are organized into subdirectories based on their type.
Let's have an `.iter_backup_type()` method which returns an
iterator over all the groups of a specific type named
ListGroupsType and factorize the type level iterator out of
ListGroups for reuse.
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
Otherwise we have to use BackupType::iter().iter() whenever
we're not using a `for _ in iter()` construct.
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This is a stop-gap measure to prevent snapshot listing from
blocking the main async worker threads as it can potentially
do a *lot* of I/O.
Ideally we'll move to a proper streaming API, but this will
be an API break.
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
when snapshots vanish during tape backup, we skip them. Until now,
we also warned with the error and failed the task at the end.
Since deleting snapshots during tape backup does not really interfere
with it, don't fail the whole task, and only add a log line that it
was skipped.
To differentiate from different errors (e.g. permission problems),
introduce a 'SnapshotBackupResult' which is returned by 'backup_snapshot'.
Also remove the 'pub' there since we don't want to leak the
SnapshotBackupResult type and it's not used anywhere outside this file.
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
when creating the documentation (e.g. `cargo doc --open`), it would
warn that `Display` is not in scope.
Signed-off-by: Stefan Sterz <s.sterz@proxmox.com>
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
readdir/getdents may return 'DT_UNKNOWN' for the file type
(which corresponds to 'None' in nix::dir::Entry), so stat the file and
check the type
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
this prevents an oom kill when listing large directories.
Without this, i'd get an oom kill in the restore vm when
i tried to list a directory with ~60000 entries, but with this,
i'd get the response for even 250000 entries
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
