From: Andrew Morton <akpm@osdl.org>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: get_swap_bio() question
Date: Sat, 12 Aug 2006 17:23:41 -0700 [thread overview]
Message-ID: <20060812172341.0132a415.akpm@osdl.org> (raw)
In-Reply-To: <200608112332.18015.rjw@sisk.pl>
On Fri, 11 Aug 2006 23:32:17 +0200
"Rafael J. Wysocki" <rjw@sisk.pl> wrote:
> Hi,
>
> I'm looking at get_swap_bio() in mm/page_io.c and wonder why the result of
> map_swap_page() in there is multiplied by (PAGE_SIZE >> 9). Is it the block
> size of 512 B hardcoded? And if so, is that actually right (I mean, aren't there
> any block devices with different block sizes)?
>
Yep, the Linux block layer is based on a 512-bytes sector all over the
place. Everywhere you see a sector_t, that's in units of 512-byte-sectors.
prev parent reply other threads:[~2006-08-13 0:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-11 21:32 Rafael J. Wysocki
2006-08-13 0:23 ` Andrew Morton [this message]
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