linux-ext4 - Re: ext4: delayed allocation support and mmap

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Date:	Wed, 17 Aug 2011 14:53:34 +0300
From:	Surbhi Palande <ameyasurbhi@...il.com>
To:	Jan Kara <jack@...e.cz>
Cc:	linux-ext4@...r.kernel.org, Ted Tso <tytso@....edu>
Subject: Re: ext4: delayed allocation support and mmap

On Wed, Aug 17, 2011 at 2:49 PM, Jan Kara <jack@...e.cz> wrote:
>  Hi,
>
> On Wed 17-08-11 14:02:09, Surbhi Palande wrote:
>> Current ext4_page_mkwrite() implementation always allocates a block
>> through  ext4_get_block_write() or ext4_get_block().
>  Why do you think so? Look at:
>        /* Delalloc case is easy... */
>        if (test_opt(inode->i_sb, DELALLOC) &&
>            !ext4_should_journal_data(inode) &&
>            !ext4_nonda_switch(inode->i_sb)) {
>                do {
>                        ret = __block_page_mkwrite(vma, vmf,
>                                                   ext4_da_get_block_prep);
>                } while (ret == -ENOSPC &&
>                       ext4_should_retry_alloc(inode->i_sb, &retries));
>                goto out_ret;
>        }

Oops! Sorry about that :(

Regards,
Surbhi.




>
>                                                                Honza
> --
> Jan Kara <jack@...e.cz>
> SUSE Labs, CR
>
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