From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Hugh Dickins <hughd@google.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
Ric Wheeler <ricwheeler@gmail.com>,
Christian Brandt <brandtc@psi5.com>,
linux-kernel@vger.kernel.org, Mike Snitzer <snitzer@redhat.com>
Subject: Re: swap storage alignment and stride size
Date: Wed, 15 Dec 2010 14:30:44 -0500 [thread overview]
Message-ID: <yq18vzq6dgb.fsf@sermon.lab.mkp.net> (raw)
In-Reply-To: <alpine.LSU.2.00.1012142038430.13004@tigran.mtv.corp.google.com> (Hugh Dickins's message of "Tue, 14 Dec 2010 20:57:28 -0800 (PST)")
>>>>> "Hugh" == Hugh Dickins <hughd@google.com> writes:
Hugh> (scan_swap_map does try to allocate in 1MB clusters, but they're
Hugh> not written out that way, and there's no attempt to align: if it
Hugh> worked out better for the lower level to require that these 1MB
Hugh> clusters are aligned, we could probably go for that - though the
Hugh> swap header page might then be a nuisance.)
You called it a "header page". Does that imply that it is page sized?
Or will it cause pages written to a 4k-aligned swap device to be
misaligned?
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2010-12-15 19:31 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-08 17:03 Christian Brandt
2010-12-08 19:56 ` Ric Wheeler
2010-12-14 20:00 ` Martin K. Petersen
2010-12-15 4:57 ` Hugh Dickins
2010-12-15 19:30 ` Martin K. Petersen [this message]
2010-12-16 0:42 ` Hugh Dickins
2010-12-16 23:46 ` Martin K. Petersen
2010-12-17 0:15 ` Christian Brandt
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