Messages in this thread Patch in this message | | | Date | Wed, 20 Jan 2010 17:19:12 +0200 | From | Jarkko Lavinen <> | Subject | [PATCH] mm: Fix nr_good_pages calculation |
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Swapon wastes one page of swap space to no effect.
Mkswap stores the value 'pages - 1' into last_page field, where pages is the partition size in pages. When nr_good_pages is calculated, last_page + 1 should be used for the number of all the pages header included.
Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com> --- mm/swapfile.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/mm/swapfile.c b/mm/swapfile.c index 6c0585b..50d90ca 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -1961,7 +1961,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) if (error) goto bad_swap; - nr_good_pages = swap_header->info.last_page - + nr_good_pages = swap_header->info.last_page + 1 - swap_header->info.nr_badpages - 1 /* header page */; -- 1.6.5
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