Re: [ANNOUNCE] v5.6.17-rt10

Re: [ANNOUNCE] v5.6.17-rt10

[Sebastian Andrzej Siewior]

On 2020-06-16 14:45:03 [+0200], To Thomas Gleixner wrote:
> Dear RT folks!
> 
> I'm pleased to announce the v5.6.17-rt10 patch set. 
> 
> Changes since v5.6.17-rt9:
> 
>   - Add the seqcount series by Ahmed S. Darwish.
>     The series annotates the lock protecting the struct seqcount against
>     multiple writer. In RT the lock annotation can be utilized to block
>     on in case the writer is active. This is the same technique that is
>     used now but we can avoid replacing the seqcount with a seqlock and
>     have code that is closer to mainline.
>     
>     As part of the integration I dropped seqcount replacements which
>     are no longer needed, like in NFS or vfs.
> 
>   - Added down_read_non_owner() for RT. There is no owner tracking since
>     we allow multiple reader locking on struct rw_semaphore. This
>     removes on patch from the NFS subsystem and allows to enable bcache.
> 
>   - Drop the lock raw_spinlock_t from struct hlist_bl_head. The struct
>     hlist_bl_head uses bit_spin_lock() for locking so we are still
>     spinning.
> 
> Known issues
>      - It has been pointed out that due to changes to the printk code the
>        internal buffer representation changed. This is only an issue if tools
>        like `crash' are used to extract the printk buffer from a kernel memory
>        image.
> 
> The delta patch against v5.6.17-rt9 is appended below and can be found here:
>  
>      https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.6/incr/patch-5.6.17-rt9-rt10.patch.xz
> 
> You can get this release via the git tree at:
> 
>     git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v5.6.17-rt10
> 
> The RT patch against v5.6.17 can be found here:
> 
>     https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.6/older/patch-5.6.17-rt10.patch.xz
> 
> The split quilt queue is available at:
> 
>     https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.6/older/patches-5.6.17-rt10.tar.xz

Again without the delta diff since the email was too huge. It can be
still look on at
   https://git.kernel.org/rt/linux-rt-devel/d/v5.6.17-rt10/v5.6.17-rt9

Sebastian