On Thu, Oct 21, 2010 at 11:44 AM, Cedric BAIL <[email protected]> wrote:
> On Thu, Oct 21, 2010 at 1:03 PM, Gustavo Sverzut Barbieri
> <[email protected]> wrote:
>> On Thu, Oct 21, 2010 at 4:10 AM, Cedric BAIL <[email protected]> wrote:
>>> On Wed, Oct 20, 2010 at 7:20 PM, Gustavo Sverzut Barbieri
>>> <[email protected]> wrote:
>>>> On Wed, Oct 20, 2010 at 2:42 PM, Enlightenment SVN
>>>> <[email protected]> wrote:
>>>>> Log:
>>>>>        * eio: add eio_file_chmod and eio_file_chown.
>>>>
>>>> Okay, we're in a thread, but recursive operations should use the "at"
>>>> variants to speed them up. Would you mind implementing them as well
>>>> (using your code as fallback when they are not available)?  It's
>>>> basically dirfd(DIR *d) then use this as parameter for openat(),
>>>> unlinkat(), ...  I'm also following systemd and see they're
>>>> effectively using it for good! (may also be used as a good source of
>>>> examples git://anongit.freedesktop.org/systemd)
>>>
>>> I am not really sure how much it could help. As we need to separate
>>> the listing stage from the action, so that we can send progress
>>> information. I will look how we can use that, but I don't expect
>>> something really useful here.
>>
>> still the actual operation is on the thread and recursively walking
>> directories is faster as a good amount of the path is already
>> resolved, you just incrementally use another point. If you have
>> /a/b/c/d/e/f, to walk to /a/b/c/d/e/f/g the kernel needs to resolve
>> the other paths AGAIN. With *at variants it does not.
>
> Yes, of course, that's not my point. The problem is that I do close
> all ressource before listing another one, because I fear ressource
> consuption a lot. But maybe I am wrong and it would not be a problem.
> Right now the bug I would like to fix, is infinite recursion. I don't
> know yet how to cleanly solve that, maybe you have an idea.

is it a code bug or due symlink loops?


-- 
Gustavo Sverzut Barbieri
http://profusion.mobi embedded systems
--------------------------------------
MSN: [email protected]
Skype: gsbarbieri
Mobile: +55 (19) 9225-2202

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