lkml.org 
[lkml]   [2006]   [Jul]   [5]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateTue, 04 Jul 2006 22:13:12 -0700
From"H. Peter Anvin" <>
SubjectRe: ext4 features
Bill Davidsen wrote:
>>
>> DC> Easily doable in userspace, why bother with kernel programming
>>
>> In userspace you can't automatically delete the files when the space
>> becomes needed. The LD_PRELOAD/glibc methods also have the
>> disadvantage of having to figure out where a file goes when it's
>> deleted, depending on which device it happens to reside on. Demanding
>> read access to /proc/mounts just to do rm could cause problems.
>>
>> Userspace has had 10 years to invent a good solution. If it was so
>> easy, it would probably have been done.
>>
> Actually, if it were so important it WOULD have been done. I suspect 
> that the issue is not lack of a good solution, but lack of a good 
> problem. The behavior you propose requires a lot of kernel cleverness, 
> including make the inodes seem to go away, so the count is "right" for 
> what the user sees.
> 

The real solution for it is snapshots.

	-hpa
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-07-05 05:15    [from the cache]
©2003-2008