Re: [PATCH REBASED 3/6] s390: Add __down_read_killable()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Sat, 30 Sep 2017 11:20:02 +0200
Heiko Carstens <heiko.carstens@xxxxxxxxxx> wrote:

> On Fri, Sep 29, 2017 at 07:06:18PM +0300, Kirill Tkhai wrote:
> > Similar to __down_write_killable(), and read killable primitive.
> > 
> > Signed-off-by: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
> > ---
> >  arch/s390/include/asm/rwsem.h |   18 ++++++++++++++++--
> >  1 file changed, 16 insertions(+), 2 deletions(-)
> > 
> > diff --git a/arch/s390/include/asm/rwsem.h b/arch/s390/include/asm/rwsem.h  
> 
> FWIW, while looking into this patch I realized that we never optimized our
> rwsem primitives to make use of new atomic instructions.
> 
> The generic rwsem header file however does, since it uses atomic ops which
> we did optimize. Even when compiling for old machines the generic version
> generates better code. Therefore I will remove the 15 years old s390
> implementation and switch to the generic version instead.

Take care not to conflict with the queued spinlock/rwlock patches on the
features branch. 

https://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git/commit/?h=features&id=eb3b7b848fb3dd00f7a57d633d4ae4d194aa7865

Me thinks that what you have in mind is already done.

-- 
blue skies,
   Martin.

"Reality continues to ruin my life." - Calvin.

--
To unsubscribe from this list: send the line "unsubscribe linux-alpha" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Netdev]     [Linux Wireless]     [Kernel Newbies]     [Security]     [Linux for Hams]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux Admin]     [Samba]

  Powered by Linux