linux-kernel - Re: [PATCH 4/8] exofs: address_space

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Message-ID: <49C61157.6070604@gmail.com>
Date:	Sun, 22 Mar 2009 11:22:15 +0100
From:	Marcin Slusarz <marcin.slusarz@...il.com>
To:	Boaz Harrosh <bharrosh@...asas.com>
CC:	Avishay Traeger <avishay@...il.com>, Jeff Garzik <jeff@...zik.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Evgeniy Polyakov <zbr@...emap.net>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	open-osd <osd-dev@...n-osd.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Subject: Re: [PATCH 4/8] exofs: address_space_operations

Boaz Harrosh wrote:
> (...)
> +struct page_collect {
> +	struct exofs_sb_info *sbi;
> +	struct request_queue *req_q;
> +	struct inode *inode;
> +	unsigned expected_pages;
> +
> +	struct bio *bio;
> +	unsigned nr_pages;
> +	unsigned long length;
> +	long pg_first;
> +};
> (...)
> +int pcol_try_alloc(struct page_collect *pcol)
> +{
> +	int pages = min_t(unsigned, pcol->expected_pages, BIO_MAX_PAGES);
> +
> +	for (; pages; pages >>= 1) {
> +		pcol->bio = bio_alloc(GFP_KERNEL, pages);
> +		if (likely(pcol->bio))
> +			return 0;
> +	}
> +
> +	EXOFS_ERR("Failed to kcalloc expected_pages=%d\n",

%u

> +		  pcol->expected_pages);
> +	return -ENOMEM;
> +}
> +
> (...)
> +static int __readpages_done(struct osd_request *or, struct page_collect *pcol,
> +			    bool do_unlock)
> +{
> +	struct bio_vec *bvec;
> +	int i;
> +	u64 resid;
> +	u64 good_bytes;
> +	u64 length = 0;
> +	int ret = exofs_check_ok_resid(or, &resid, NULL);
> +
> +	osd_end_request(or);
> +
> +	if (!ret)
> +		good_bytes = pcol->length;
> +	else if (ret && !resid)
> +		good_bytes = 0;
> +	else
> +		good_bytes = pcol->length - resid;

Second ret check is not needed.

> (...)
> +
> +int read_exec(struct page_collect *pcol, bool is_sync)

read_exec is too generic name for globally visible symbol

> +{
> (...)
> +static void writepages_done(struct osd_request *or, void *p)
> +{
> +	struct page_collect *pcol = p;
> +	struct bio_vec *bvec;
> +	int i;
> +	u64 resid;
> +	u64  good_bytes;
> +	u64  length = 0;
> +
> +	int ret = exofs_check_ok_resid(or, NULL, &resid);
> +
> +	osd_end_request(or);
> +	atomic_dec(&pcol->sbi->s_curr_pending);
> +
> +	if (likely(!ret))
> +		good_bytes = pcol->length;
> +	else if (ret && !resid)
> +		good_bytes = 0;
> +	else
> +		good_bytes = pcol->length - resid;

Ret check again.

> (...)
> +
> +int write_exec(struct page_collect *pcol)

Too generic name.

> (...)

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