From 8082ce8f5363bc33028d162d1c7a7e3b2c0950e9 Mon Sep 17 00:00:00 2001 From: Jim Meyering Date: Sat, 24 Jul 1999 09:40:23 +0000 Subject: [PATCH] add to comment --- src/dd.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/src/dd.c b/src/dd.c index 6e0da6b265..d4978248c3 100644 --- a/src/dd.c +++ b/src/dd.c @@ -864,7 +864,12 @@ dd_copy (void) page boundary to cover all bases. Note that due to the swab algorithm, we must have at least one byte in the page before the input buffer; thus we allocate 2 pages of slop in the - real buffer. 8k above the blocksize shouldn't bother anyone. */ + real buffer. 8k above the blocksize shouldn't bother anyone. + + The page alignment is necessary on any linux system that supports + either the SGI raw I/O patch or Steven Tweedies raw I/O patch. + It is necessary when accessing raw (i.e. character special) disk + devices on Unixware or other SVR4-derived system. */ real_buf = (unsigned char *) xmalloc (input_blocksize + 2 * SWAB_ALIGN_OFFSET -- 2.47.3