Re: drbd-9.1.22-rc.1 and drbd-9.2.11-rc.1

Dear all,=20
thanks for all the efforts over the years.
Mind you, please, removing me from the DL?
have a great time, cheers
Ralph


> Am 05.08.2024 um 15:22 schrieb Philipp Reisner =
<[email protected]>:
>=20
>=20
> Hello DRBD-users,
>=20
>=20
> A detail I never cared about is if a syscall gets restarted or returns
> EINTR after the arrival of a signal. What made me learn this detail is =
a
> customer whose system newly created processes get a signal. Often, a
> process open()s the resources it needs to work with first, and in this
> occation, that was a drbd device.
>=20
> When auto-promote is enabled (which it is by default), DRBD will =
promote
> the drbd device to primary in the open() system call of a user space
> process. It needs to exchange some network packets, which can easily
> take milliseconds.
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> Now, when a (non-fatal) signal arrived at just that moment, DRBD
> dutifully interrupted the promote operation and returned to user =
space,
> with an errno indicating that the device was not primary.
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> And here is the problem for a random user-space process, it got an
> unexpected errno from open() and terminated.
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> Then, I learned about EINTR and restartable syscalls. Starting with =
this
> release, DRBD will restart the open() syscall in such a scenario =
unless
> the user prepared to receive an EINTR from open() by calling =
sigaction()
> and omitting SA_RESTART before.
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> Please help test the release candidate.
>=20
> 9.2.11-rc.1 (api:genl2/proto:86-122/transport:19)
> --------
> * Changed merged rom 9.1.22
>  - Upgrade from partial resync to a full resync if necessary when the
>    user manually resolves a split-brain situation
>  - Fix a potential NULL deref when a disk fails while doing a
>    forget-peer operation.
>  - Fix a rcu_read_lock()/rcu_read_unlock() imbalance
>  - Restart the open() syscall when a process auto promoting a drbd =
device gets
>    interrupted by a signal
>  - Remove a deadlock that caused DRBD to connect sometimes
>    exceptionally slow
>  - Make detach operations interruptible
>  - Added dev_is_open to events2 status information
>  - Improve log readability for 2PC state changes and drbd-threads
>  - Updated compability code for Linux 6.9
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>=20
> https://pkg.linbit.com//downloads/drbd/9/drbd-9.1.22-rc.1.tar.gz
> =
https://github.com/LINBIT/drbd/commit/d10418bf63f0b664305d9bd4779cb48965d4=
34f5
>=20
> https://pkg.linbit.com//downloads/drbd/9/drbd-9.2.11-rc.1.tar.gz
> =
https://github.com/LINBIT/drbd/commit/c52d24bca2b1c659bfba19d19602c7e319c7=
416d
>=20