From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
To: Namjae Jeon <linkinjeon@gmail.com>
Cc: akpm@linux-foundation.org, bfields@fieldses.org,
viro@zeniv.linux.org.uk, linux-kernel@vger.kernel.org,
Namjae Jeon <namjae.jeon@samsung.com>,
Ravishankar N <ravi.n1@samsung.com>,
Amit Sahrawat <a.sahrawat@samsung.com>
Subject: Re: [PATCH v2 4/5] fat: eliminate orphaned inode number allocation
Date: Wed, 05 Sep 2012 22:56:47 +0900 [thread overview]
Message-ID: <87r4qg374w.fsf@devron.myhome.or.jp> (raw)
In-Reply-To: <CAKYAXd8Pspe0nobWedVfOwVYEKQsXx-Kbs1gWJm5F0ARgusTUw@mail.gmail.com> (Namjae Jeon's message of "Wed, 5 Sep 2012 22:37:41 +0900")
Namjae Jeon <linkinjeon@gmail.com> writes:
> 2012/9/5, OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>:
>> OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> writes:
>>
>>> Namjae Jeon <linkinjeon@gmail.com> writes:
>>>
>>>> From: Namjae Jeon <namjae.jeon@samsung.com>
>>>>
>>>> Maintain a list of inode(i_pos) numbers of orphaned inodes (i.e the
>>>> inodes that have been unlinked but still having open file
>>>> descriptors).At file/directory creation time, skip using such i_pos
>>>> values.Removal of the i_pos from the list is done during inode eviction.
>>>
>>> What happens if the directory (has busy entries) was completely removed?
> Hi OGAWA.
> There are 2 cases:
> 1. The cluster can be used as a data cluster of a file - In which case
> we can write
> normally into it.
> 2. The cluster can be allocated to a new directory. In this case, the busy i_pos
> locations can not be used to create new entries until the correspnding
> inodes are
> evicted.
In the (2) case, it has problem. Directory must not have de->name[0] == 0
in middle of entires. "0" means the end of directory.
--
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
next prev parent reply other threads:[~2012-09-05 13:56 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-04 15:58 [PATCH v2 4/5] fat: eliminate orphaned inode number allocation Namjae Jeon
2012-09-04 17:00 ` OGAWA Hirofumi
2012-09-04 17:07 ` OGAWA Hirofumi
2012-09-04 18:38 ` J. Bruce Fields
2012-09-04 19:02 ` OGAWA Hirofumi
2012-09-04 19:25 ` J. Bruce Fields
2012-09-04 20:45 ` NeilBrown
2012-09-05 13:37 ` Namjae Jeon
2012-09-05 13:56 ` OGAWA Hirofumi [this message]
2012-09-06 6:30 ` Namjae Jeon
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