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From 4c8988667193cbd405eae05518425905db517626 Mon Sep 17 00:00:00 2001
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From: Jan Chaloupka <jchaloup@redhat.com>
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Date: Wed, 30 Jul 2014 17:35:04 +0200
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Subject: [PATCH] open.2
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---
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man-pages/man2/open.2 | 17 ++++++++++++-----
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1 file changed, 12 insertions(+), 5 deletions(-)
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diff --git a/man-pages/man2/open.2 b/man-pages/man2/open.2
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index 84331c6..6b25e7b 100644
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--- a/man-pages/man2/open.2
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+++ b/man-pages/man2/open.2
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@@ -875,10 +875,16 @@ for doing so, for example the
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operation in
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.BR xfsctl (3).
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.LP
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-Under Linux 2.4, transfer sizes, and the alignment of the user buffer
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-and the file offset must all be multiples of the logical block size
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-of the file system.
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-Under Linux 2.6, alignment to 512-byte boundaries suffices.
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+Under Linux 2.4, transfer sizes, and the alignment of the user buffer
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+and the file offset must all be multiples of the logical block size of
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+the filesystem. Since Linux 2.6.0, alignment to the logical block size
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+of the underlying storage (typically 512 bytes) suffices. The logical
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+block size can be determined using the ioctl(2) BLKSSZGET operation or
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+from the shell using the command:
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+
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+.RS
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+.BR blockdev " " --getss
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+.RE
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.LP
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.B O_DIRECT
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I/Os should never be run concurrently with the
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@@ -1010,7 +1016,8 @@ to enable this flag.
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.BR fopen (3),
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.BR fifo (7),
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.BR path_resolution (7),
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-.BR symlink (7)
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+.BR symlink (7),
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+.BR blockdev (8)
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.SH COLOPHON
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This page is part of release 3.53 of the Linux
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.I man-pages
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--
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1.9.3
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