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A full example with dovecot debug symbols activated (note since I have activate valgrind, no more segfault it?s normal I presume ): Dec 4 12:09:40 dovecot: auth-worker: Error: ==3071== Invalid read of size 8 Dec 4 12:09:40 dovecot: auth-worker: Error: ==3053== Invalid read of size 8 Dec 4 12:09:40 dovecot: auth-worker: Error: ==3057== Invalid read of size 8 Dec 4 12:09:40 dovecot: auth-worker: Error: ==3057== at 0x6E8767F: mysql_close (mariadb_lib.c:1916...

On 2 Dec 2018, at 22.22, Guillaume via dovecot <dovecot at dovecot.org> wrote: > > I also have this kind of segfault since the update : > > Dec 2 21:12:11 xxxxxxx dovecot: auth-worker: Error: *** Error in `dovecot/auth': double free or corruption (fasttop): 0x000055573bb99f70 Is this easy to reproduce? Can you try with valgrind? It will slow down the logins a bit though. service auth-worker { executable = /usr/bin/valgrind -q --vgdb=no /usr/lib/dovecot/auth -w } At leas...

Hi ! Yes it happens every 2 to 5 minutes so no problem in reproducing. I made the change with valgrind, I have now this in my log : Dec 4 12:00:27 xxxxx dovecot: auth-worker: Error: ==2436== Invalid read of size 8 Dec 4 12:00:27 xxxxx dovecot: auth-worker: Error: ==2393== Invalid read of size 8 Dec 4 12:00:27 xxxxx dovecot: auth-worker: Error: ==2476== Invalid read of size 8 Dec 4 12:00:27 xxxxx dovecot: auth-worker: Error: ==2431== Invalid read of size 8 Dec 4 12:...

If userspace does VHOST_VSOCK_SET_GUEST_CID before VHOST_SET_OWNER we can race where: 1. thread0 calls vhost_transport_send_pkt -> vhost_work_queue 2. thread1 does VHOST_SET_OWNER which calls vhost_worker_create. 3. vhost_worker_create will set the dev->worker pointer before setting the worker->vtsk pointer. 4. thread0's vhost_work_queue will see the dev->worker pointer is set and try to call vhost_task_wake using not yet set worker->vtsk pointer. 5. We then crash since vtsk is NULL....

If userspace does VHOST_VSOCK_SET_GUEST_CID before VHOST_SET_OWNER we can race where: 1. thread0 calls vhost_transport_send_pkt -> vhost_work_queue 2. thread1 does VHOST_SET_OWNER which calls vhost_worker_create. 3. vhost_worker_create will set the dev->worker pointer before setting the worker->vtsk pointer. 4. thread0's vhost_work_queue will see the dev->worker pointer is set and try to call vhost_task_wake using not yet set worker->vtsk pointer. 5. We then crash since vtsk is NULL....

...${i} BEFORE ${TODAY} SINCE ${FIRST_LAST_MONTH} doveadm -f tab mailbox status messages ${i} echo `date` done ${i} done rm /tmp/ler-mailbox-list.$$ It runs at 00:30:00 local time on the first of the month. While it was running I got: Jul 1 00:30:00 thebighonker dovecot: indexer-worker(ler): Error: lucene: Failed to sync mailbox INBOX: Mailbox isn't selectable Jul 1 00:30:00 thebighonker dovecot: indexer-worker(ler): Panic: file mailbox-list.c: line 1125 (mailbox_list_try_mkdir_root): assertion failed: (strncmp(root_dir, path, strlen(root_dir)) == 0) Jul 1 00:30:00 thebigho...

...a synchronize_rcu calls. diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index a92af08e7864..03fd47a22a73 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -235,7 +235,7 @@ void vhost_dev_flush(struct vhost_dev *dev) { struct vhost_flush_struct flush; - if (dev->worker) { + if (READ_ONCE(dev->worker.vtsk)) { init_completion(&flush.wait_event); vhost_work_init(&flush.work, vhost_flush_work); @@ -247,7 +247,9 @@ EXPORT_SYMBOL_GPL(vhost_dev_flush); void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work) { - if (!dev->worker) +...

I have been facing this damn ugly issue since quite sometime. So this worker reads RSS feed from Yahoo news and stores it in a DB. The worker is scheduled to run at every 40 minutes and my background_schedules.yml looks like this: feed_worker: :class: :feed_worker :job_key: :feed_worker_key :worker_method: :do_work :trigger_args: :start: <%= Time.now + 5 %&g...

For vhost-scsi with 3 vqs and a workload like that tries to use those vqs like: fio --filename=/dev/sdb --direct=1 --rw=randrw --bs=4k \ --ioengine=libaio --iodepth=128 --numjobs=3 the single vhost worker thread will become a bottlneck and we are stuck at around 500K IOPs no matter how many jobs, virtqueues, and CPUs are used. To better utilize virtqueues and available CPUs, this patch allows userspace to create workers and bind them to vqs. You can have N workers per dev and also share N workers w...

Hi! I''m using the latest&greatest backgroundrb with rails 2.0.2 on ubuntu dapper. I''ve made an app that lets you run a query on several servers at once, which are selected at runtime. Therefore, for each server that is selected, I spawn a new worker and assign its work. After everything is completed, the workers are deleted. I often get this error: BackgrounDRb::BdrbConnError in Multi com/indexController#uitvoeren Not able to connect Here''s the code that spawns the workers: (sorry for the linewraps) def uitvoeren # put selec...

...t switch to the latter like below to just fix >the crash if we think that is more simple. > >I think RCU is just a little more complex/invasive because it will have the >extra synchronize_rcu calls. Yes, you may be right, in this case we should just need READ_ONCE/WRITE_ONCE if dev->worker is no longer a pointer. > > >diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c >index a92af08e7864..03fd47a22a73 100644 >--- a/drivers/vhost/vhost.c >+++ b/drivers/vhost/vhost.c >@@ -235,7 +235,7 @@ void vhost_dev_flush(struct vhost_dev *dev) > { > struct vhost...

On Mon, Jun 05, 2023 at 01:57:30PM -0500, Mike Christie wrote: >If userspace does VHOST_VSOCK_SET_GUEST_CID before VHOST_SET_OWNER we >can race where: >1. thread0 calls vhost_transport_send_pkt -> vhost_work_queue >2. thread1 does VHOST_SET_OWNER which calls vhost_worker_create. >3. vhost_worker_create will set the dev->worker pointer before setting >the worker->vtsk pointer. >4. thread0's vhost_work_queue will see the dev->worker pointer is >set and try to call vhost_task_wake using not yet set worker->vtsk >pointer. >5. We then c...

Hi ! First of all thanks for all your doing :) I also have this kind of segfault since the update : Dec 2 21:12:11 xxxxxxx dovecot: auth-worker: Error: *** Error in `dovecot/auth': double free or corruption (fasttop): 0x000055573bb99f70 *** Dec 2 21:12:11 xxxxxxx dovecot: auth-worker: Error: ======= Backtrace: ========= Dec 2 21:12:11 xxxxxxx dovecot: auth-worker: Error: /lib/x86_64-linux-gnu/libc.so.6(+0x70bfb)[0x7f961ab00bfb] Dec...

On Wed, Apr 5, 2023 at 7:08?AM Mike Christie <michael.christie at oracle.com> wrote: > > On 4/4/23 3:00 AM, Jason Wang wrote: > >> > >> -static void vhost_worker_free(struct vhost_dev *dev) > >> +static void vhost_worker_put(struct vhost_dev *dev, struct vhost_worker *worker) > >> { > >> - struct vhost_worker *worker = dev->worker; > >> - > >> if (!worker) > >> return; &...

Signaling using normal kill(2) is preserved, but the master now prefers to signal workers using a pipe rather than kill(2). Non-graceful signals (:TERM/:KILL) are still sent using kill(2), as they ask for immediate shutdown. This change is necessary to avoid triggering the ubf (unblocking function) for rb_thread_call_without_gvl (and similar) functions extensions. Most notably, this...

>>>>> "Luciano" == Luciano Mannucci <luciano at vespaperitivo.it> writes: > I'm trying to set up a dovecot server so that it authenticates local > user via /etc/passwd (I'm on a Freebsd 13.1) and via winbindd for > those that it cannot find localy. The samba suite is alive and well, > postfix gets happily mail from domain users and saves it with

Hello. We're setting up fts solr and want to have the solr server host be set per-user via UserDB. It looks like if a user connects and fts indexes mail, and then another user connects and indexes mail, indexer-worker is connecting to the first user's fts host: User1, hammer at rp-auth-test.com connects, does a SEARCH for the first time, indexer-worker gets UserDB settings and correctly indexes mail on ftsvs01: [...] auth-worker(2195): Debug: dict(hammer at rp-auth-test.com): lookup shared/userdb/hammer at...

The following patches were built over linux-next which contains various vhost patches in mst's tree and the vhost_task patchset in Christian Brauner's tree: git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git kernel.user_worker branch: https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git/log/?h=kernel.user_worker The latter patchset handles the review comment for the patches in thread to make sure that worker threads we create are accounted for in the parent process's NPROC limit. The patches are schedu...

I have a worker which wants to delete itself after it finishes its work- how can it do that? Best Regards, Danny Burkes

Since MiddleMan is an uninitialized constant in a worker how do you create new workers inside a worker? Thank You, Ben Johnson E: bjohnson at contuitive.com O: 800-341-6826 M: 817-229-4258 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://rubyforge.org/pipermail/backgroundrb-devel/attachments/20060731/75a77fa6/a...