Re: SLUB sysfs support

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

 



On Thu, Dec 27, 2007 at 03:22:28PM -0800, Christoph Lameter wrote:
> > a) remove symlink when slab goes away
> 
> Ok. Need to think about how to code that.

Huh?  Just call it from kmem_cache_destroy(); what business does that symlink
have being around after that point?

> > b) instead of kfree() in slab removal do kobject_put() if you have sysfs stuff
> 
> Hmmmm.... Okay. Patch follows but its strange to do a kobject_put after a 
> kobject_del().

kobject_del() undoes the effect of kobject_add().  And then you are left
with the refcount you had before kobject_add(), i.e. from kobject_init().

Think of it that way: kobject refcount controls the lifetime of structure
the sucker's embedded into.  Depending on kobject methods, you might
be unable to do cleanup of non-kobject parts of that animal until after
kobject_del().  IOW, you _can't_ have kobject_del() dropping the (hopefully)
final reference to kobject - only the caller knows what might have to be
done in between.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux