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From: Brice Goglin <brice.goglin@gmail.com>
To: "Theodore Ts'o" <tytso@mit.edu>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: Why is SECTOR_SIZE = 512 inside kernel ?
Date: Tue, 18 Aug 2015 23:06:47 +0200	[thread overview]
Message-ID: <55D39E67.3010009@gmail.com> (raw)
In-Reply-To: <20150817135450.GB27202@thunk.org>

Le 17/08/2015 15:54, Theodore Ts'o a écrit :
> 
> It's cast in stone.  There are too many places all over the kernel,
> especially in a huge number of file systems, which assume that the
> sector size is 512 bytes.  So above the block layer, the sector size
> is always going to be 512.

Could this be a problem when using pmem/nvdimm devices with
byte-granularity (no BTT layer)? (hw_sector_size reports
512 in this case while we could expect 1 instead).
Or it just doesn't matter because BTT is the only way to use
these devices for filesystems like other block devices?

thanks
Brice


  reply	other threads:[~2015-08-18 21:06 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-17 12:53 Why is SECTOR_SIZE = 512 inside kernel ? Navin P
2015-08-17 13:54 ` Theodore Ts'o
2015-08-18 21:06   ` Brice Goglin [this message]
2015-08-18 21:38     ` tytso
  -- strict thread matches above, loose matches on Subject: below --
2015-08-17 11:05 Navin P
     [not found] ` <14960.1439831792@turing-police.cc.vt.edu>
2015-08-17 18:03   ` Navin P

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