linux-ext4 - Re: [RFC][Patch 1/2] Persistent preallocation in ext4

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Message-ID: <20061220062842.GA2988@amitarora.in.ibm.com>
Date:	Wed, 20 Dec 2006 11:58:42 +0530
From:	"Amit K. Arora" <aarora@...ux.vnet.ibm.com>
To:	Andreas Dilger <adilger@...sterfs.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [RFC][Patch 1/2] Persistent preallocation in ext4

On Tue, Dec 19, 2006 at 02:12:06PM -0700, Andreas Dilger wrote:
> Minor edits (not worth a resubmit by itself):

Thanks, Andreas ! I will take care of these comments in the next
submission.

Regards,
Amit Arora
> 
> On Dec 19, 2006  16:35 +0530, Amit K. Arora wrote:
> > +		/* ext4_can_extents_be_merged should have checked that either
> > +		 * both extents are uninitialized, or both aren't. Thus we
> > +		 * need to check any of them here.
> 
> s/any/only one/
> 
> >
> > +	case EXT4_IOC_PREALLOCATE: {
> > +		if (IS_RDONLY(inode))
> > +			return -EROFS;
> > +
> > +		if (copy_from_user(&input,
> > +			(struct ext4_falloc_input __user *) arg, sizeof(input)))
> > +			return -EFAULT;
> > +
> > +		if (input.len == 0)
> > +			return -EINVAL;
> > +
> > +		if (!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL))
> > +			return -ENOTTY;
> 
> May as well put this check before copy_from_user(), since it doesn't need
> the user data and is much faster to check first.
> 
> > +retry:
> > +		ret = 0;
> > +		while(ret>=0 && ret<max_blocks)
> > +		{
> 
> Opening brace always on same line, like "while() {"
> 
> > +		if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb,
> > +						&retries))
> 
> &retries should be aligned with start of (inode->i_sb, on previous line.
> 
> > +		if(nblocks) {
> 
> Space between "if (" everywhere.
> 
> Cheers, Andreas
> --
> Andreas Dilger
> Principal Software Engineer
> Cluster File Systems, Inc.
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