[vbox-dev] [PATCH] performance improvements for Solaris guest shared folders

Ramshankar ramshankar.venkataraman at oracle.com
Thu Nov 10 10:17:57 GMT 2011

On 11/10/11 03:31 AM, Life is hard, and then you die wrote:
> On Wed, Nov 09, 2011 at 02:05:50PM +0100, Ramshankar wrote:
>> Thought I'd give a status update.
>> I've integrated the following patches (with some minor
>> changes/additions) after testing them out a bit.
>> vbox.panic-params.patch
>> vbox.stat-ttl.patch
>> vbox.dir-seek.patch
>> I'm giving more priority to the patches that address bugs. Patches
>> that improve performance will also be integrated but after the
>> bug-fix ones are done.
> Thanks! I completely understand. As you've probably already figured
> out, the above plus the vbox.dir-stat.patch and vbox.alloc-size.patch
> are basically bug fixes; the vbox.pre-symlink-refactor.patch and
> vbox.symlink.patch are an enhancement (i.e. symlink support); the rest
> of the patches are purely performance and related refactoring.

Yes, I had an overview of them all. I also added some other minor fixes 
like using strncpy() so we don't write past the d_name size and such. 
I've also integrated the vbox.dir-stat.patch. Will continue with the 
other patches in the coming days. Thanks & Regards,


>    Cheers,
>    Ronald
>> On 11/ 6/11 07:45 AM, Life is hard, and then you die wrote:
>>> On Sat, Nov 05, 2011 at 04:29:32AM -0700, Life is hard, and then you die wrote:
>>>> On Tue, Jan 18, 2011 at 10:45:16AM +0100, Frank Mehnert wrote:
>>>>> On Sunday 16 January 2011 11:50:06 Life is hard, and then you die wrote:
>>>>>> Attached are some patches to improve the performance of shared-folders
>>>>>> in Solaris guests. Together they speed up things between 2 to 4 times:
>>>>>> operations like untarring and deleting whole directory tree are
>>>>>> typically 2 to 2.5 times faster, and when running builds that include
>>>>>> things like building Solaris packages I see a speedup of 3 to almost 4.
>>>>>> The bulk of the speedup comes from the second (file open) patch.
>>>>>> These patches assume my previously sent patches have been applied.
>>>>>> Licensed under MIT/public-domain.
>>>>> Thank you very much for this code contribution! We will revise it a bit
>>>>> later as our colleague which maintains this code is currently not
>>>>> available.
>>>> I don't want to appear pushy, but since I've seen that some work has
>>>> been done in recent weeks on the Solaris shared-folders code, I'm
>>>> wondering if you might have time to review the patches. I rebased them
>>>> onto svn rev 39192 (and updated to VB 4.1.6) and they appear to still
>>>> work fine on Solaris 10u8 (after disabling the mmap support - see
>>>> https://www.virtualbox.org/ticket/9856).
>>>> For your convenience I've attached the rebased patches (in the order
>>>> they should be applied), though all in one email instead of spread
>>>> over 4 separate emails like last Jan.
>>> Argh! I just realized that the symlink deletion issue was fixed a
>>> while ago, so the hack in vbox.symlink.patch is not necessary anymore
>>> (yay!). Since updating this patch causes some subsequent patches to
>>> not apply cleanly anymore, I'm just re-sending the full list of
>>> patches (i.e. please ignore those I sent yesterday).
>>>    Cheers,
>>>    Ronald
> _______________________________________________
> vbox-dev mailing list
> vbox-dev at virtualbox.org
> https://www.virtualbox.org/mailman/listinfo/vbox-dev

More information about the vbox-dev mailing list