From: Jan Koss <kossjan@gmail.com>
To: kernelnewbies@nl.linux.org
Cc: linux-fsdevel@vger.kernel.org
Subject: fragmentation && blocks "realloc"
Date: Fri, 20 Jan 2006 14:47:09 +0300 [thread overview]
Message-ID: <b97d23040601200347p5cfa61derc8efae6f896871b2@mail.gmail.com> (raw)
Hello.
Let's suppose that we have file which consist of two blocks
and user resizing file and now we need 4 blocks.
Near this two blocks there are no 2 free blocks,
and instead of allocating 2 additional blocks somewhere,
I want allocate chunk of 4 blocks.
The main problem is choose way of invalidate "old" blocks and copy
data to new buffers,
how it possible on linux?
something like
struct buffer_head *oldbh, *newbh;
memcpy(newbh->b_data, oldbh->b_data);
block_invalidatepage(oldbh->b_this_page,...)
[ block_invalidatepage right choise ? ]
or it is possible just change b_blocknr?
next reply other threads:[~2006-01-20 11:47 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-20 11:47 Jan Koss [this message]
2006-01-20 13:34 ` fragmentation && blocks "realloc" Anton Altaparmakov
2006-01-20 15:46 ` Jan Koss
2006-01-20 19:22 ` Jan Koss
2006-01-20 20:11 ` Anton Altaparmakov
2006-01-21 9:42 ` Jan Koss
2006-01-21 20:28 ` Anton Altaparmakov
2006-01-22 20:58 ` Jan Koss
2006-01-22 21:32 ` Anton Altaparmakov
2006-01-22 22:05 ` Jan Koss
2006-01-24 10:37 ` Anton Altaparmakov
2006-02-23 21:47 ` Nate Diller
2006-01-20 20:04 ` Anton Altaparmakov
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