linux-kernel - Re: [PATCH 18/18] fs: do not assign default i_ino in new

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Message-ID: <20101016075728.GT19147@amd>
Date:	Sat, 16 Oct 2010 18:57:28 +1100
From:	Nick Piggin <npiggin@...nel.dk>
To:	Dave Chinner <david@...morbit.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 18/18] fs: do not assign default i_ino in new_inode

On Wed, Oct 13, 2010 at 11:16:01AM +1100, Dave Chinner wrote:
> From: Christoph Hellwig <hch@....de>
> 
> Instead of always assigning an increasing inode number in new_inode
> move the call to assign it into those callers that actually need it.
> For now callers that need it is estimated conservatively, that is
> the call is added to all filesystems that do not assign an i_ino
> by themselves.  For a few more filesystems we can avoid assigning
> any inode number given that they aren't user visible, and for others
> it could be done lazily when an inode number is actually needed,
> but that's left for later patches.

My patch for this reduces churn by just adding a new function instead.
The last_ino allocator is really fast now, so IMO it was not worth
the churn to go through filesystems; just let them do it.

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