linux-kernel - Re: [PATCH v3 1/8] swap: Add comments to lock_cluster_or_swap

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Date:   Fri, 20 Jul 2018 08:27:22 +0800
From:   "Huang\, Ying" <ying.huang@...el.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, Michal Hocko <mhocko@...e.com>,
        "Johannes Weiner" <hannes@...xchg.org>,
        Shaohua Li <shli@...nel.org>, Hugh Dickins <hughd@...gle.com>,
        Minchan Kim <minchan@...nel.org>,
        Rik van Riel <riel@...hat.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Daniel Jordan <daniel.m.jordan@...cle.com>
Subject: Re: [PATCH v3 1/8] swap: Add comments to lock_cluster_or_swap_info()

Christoph Hellwig <hch@...radead.org> writes:

> On Thu, Jul 19, 2018 at 04:48:35PM +0800, Huang Ying wrote:
>> +/*
>> + * Determine the locking method in use for this device.  Return
>> + * swap_cluster_info if SSD-style cluster-based locking is in place.
>> + */
>>  static inline struct swap_cluster_info *lock_cluster_or_swap_info(
>>  	struct swap_info_struct *si,
>>  	unsigned long offset)
>>  {
>>  	struct swap_cluster_info *ci;
>>  
>> +	/* Try to use fine-grained SSD-style locking if available: */
>
> Once you touch this are can you also please use standard two-tab
> alignment for the spill-over function arguments:
>
> static inline struct swap_cluster_info *lock_cluster_or_swap_info(
> 		struct swap_info_struct *si, unsigned long offset)

Sure.  Will change this in next version.

Best Regards,
Huang, Ying