all lists on lists.proxmox.com
 help / color / mirror / Atom feed
From: Gabriel Goller <g.goller@proxmox.com>
To: pbs-devel@lists.proxmox.com
Subject: Re: [pbs-devel] [PATCH proxmox{, -backup} 0/2] Move ProcessLocker to tmpfs
Date: Wed, 6 Dec 2023 14:29:00 +0100	[thread overview]
Message-ID: <b4b3ad0c-b52e-400c-a571-dac7dad487f9@proxmox.com> (raw)
In-Reply-To: <20231204131820.204423-1-g.goller@proxmox.com>

Submitted a new patch!

On 12/4/23 14:18, Gabriel Goller wrote:
> This moves the `ProcessLocker`'s `.lock` file to `/run/proxmox-backup/locks` (tmpfs).
>
> The first patch only converts all the `F_SETLK` flags to `F_OFD_SETLK` flags. This
> changes normal locks, which are based on the process, to locks based on an open file
> descriptor. This actually doesn't change anything, because we use mutexes, so the
> lock is already thread-safe. It would be cleaner though and would safe us from
> weird quirks like closing the lock-file which would drop all the locks when using
> the POSIX `F_SETLK`. See more here [0].
>
> The second patch changes the location of the `.lock` file to the `/run/proxmox-backup/locks`
> tmpfs directory. Like this we don't need to lazy-lock anything and we can keep the lockfile
> open all the time. Unmounting datastores is now possible as the lock file is not on the
> datastore mount anymore.
>
> Another thing is noticed is that datastores that are not available (e.g. have been unmounted)
> don't display an error on the ui. That means the only way to see if a datastore is online is
> to either start a gc or verify run. An idea for a future patch would be to check if the
> datastore exists and (maybe) even automatically set the maintenance mode to `offline` if it
> doesn't exist?
>
> [0]: https://man7.org/linux/man-pages/man2/fcntl.2.html
>
>
>
> proxmox:
>
> Gabriel Goller (1):
>    process_locker: use ofd locking
>
>   proxmox-sys/src/process_locker.rs | 20 ++++++++++----------
>   1 file changed, 10 insertions(+), 10 deletions(-)
>
>
> proxmox-backup:
>
> Gabriel Goller (1):
>    datastore: store datastore lock on tmpfs
>
>   pbs-datastore/src/chunk_store.rs | 11 +++++++----
>   1 file changed, 7 insertions(+), 4 deletions(-)
>
>
> Summary over all repositories:
>    2 files changed, 17 insertions(+), 14 deletions(-)
>





      parent reply	other threads:[~2023-12-06 13:29 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-12-04 13:18 Gabriel Goller
2023-12-04 13:18 ` [pbs-devel] [PATCH proxmox 1/2] process_locker: use ofd locking Gabriel Goller
2023-12-04 13:18 ` [pbs-devel] [PATCH proxmox-backup 2/2] datastore: store datastore lock on tmpfs Gabriel Goller
2023-12-06 13:29 ` Gabriel Goller [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=b4b3ad0c-b52e-400c-a571-dac7dad487f9@proxmox.com \
    --to=g.goller@proxmox.com \
    --cc=pbs-devel@lists.proxmox.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.
Service provided by Proxmox Server Solutions GmbH | Privacy | Legal