From: antlists <antlists@youngman.org.uk>
To: Zhen Lei <thunder.leizhen@huawei.com>,
Minchan Kim <minchan@kernel.org>, Nitin Gupta <ngupta@vflare.org>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
Jens Axboe <axboe@kernel.dk>,
linux-block <linux-block@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>, Alasdair Kergon <agk@redhat.com>,
Mike Snitzer <snitzer@redhat.com>, dm-devel <dm-devel@redhat.com>,
Song Liu <song@kernel.org>,
linux-raid <linux-raid@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/4] eliminate SECTOR related magic numbers and duplicated conversions
Date: Tue, 5 May 2020 18:32:36 +0100 [thread overview]
Message-ID: <ea522f15-991d-6f67-ba8b-9cb4954a1064@youngman.org.uk> (raw)
In-Reply-To: <20200505115543.1660-1-thunder.leizhen@huawei.com>
On 05/05/2020 12:55, Zhen Lei wrote:
> When I studied the code of mm/swap, I found "1 << (PAGE_SHIFT - 9)" appears
> many times. So I try to clean up it.
>
> 1. Replace "1 << (PAGE_SHIFT - 9)" or similar with SECTORS_PER_PAGE
> 2. Replace "PAGE_SHIFT - 9" with SECTORS_PER_PAGE_SHIFT
> 3. Replace "9" with SECTOR_SHIFT
> 4. Replace "512" with SECTOR_SIZE
Naive question - what is happening about 4096-byte sectors? Do we need
to forward-plan?
Cheers,
Wol
next prev parent reply other threads:[~2020-05-05 17:32 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-05 11:55 Zhen Lei
2020-05-05 11:55 ` [PATCH 1/4] block: Move SECTORS_PER_PAGE and SECTORS_PER_PAGE_SHIFT definitions into <linux/blkdev.h> Zhen Lei
2020-05-05 12:10 ` Matthew Wilcox
2020-05-06 4:06 ` Leizhen (ThunderTown)
2020-05-05 11:55 ` [PATCH 2/4] mm/swap: use SECTORS_PER_PAGE_SHIFT to clean up code Zhen Lei
2020-05-05 17:25 ` Matthew Wilcox
2020-05-06 1:33 ` Leizhen (ThunderTown)
2020-05-06 3:47 ` Leizhen (ThunderTown)
2020-05-06 9:16 ` Leizhen (ThunderTown)
2020-05-05 11:55 ` [PATCH 3/4] block: use SECTORS_PER_PAGE_SHIFT and SECTORS_PER_PAGE " Zhen Lei
2020-05-05 11:55 ` [PATCH 4/4] mtd: eliminate SECTOR related magic numbers Zhen Lei
2020-05-05 17:32 ` antlists [this message]
2020-05-05 18:01 ` [PATCH 0/4] eliminate SECTOR related magic numbers and duplicated conversions Matthew Wilcox
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