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| author | Karel Zak | 2010-02-15 16:46:05 +0100 |
|---|---|---|
| committer | Karel Zak | 2010-02-15 16:46:05 +0100 |
| commit | a47e839cd7b5e3c032c3a6b8a96343d3ab8e1906 (patch) | |
| tree | 05e07abfc300628d03c8cc3f52dbffca59a7ef74 /fdisk | |
| parent | tests: update fdisk tests (diff) | |
| download | kernel-qcow2-util-linux-a47e839cd7b5e3c032c3a6b8a96343d3ab8e1906.tar.gz kernel-qcow2-util-linux-a47e839cd7b5e3c032c3a6b8a96343d3ab8e1906.tar.xz kernel-qcow2-util-linux-a47e839cd7b5e3c032c3a6b8a96343d3ab8e1906.zip | |
fdisk: don't use 1MiB grain on small devices
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'fdisk')
| -rw-r--r-- | fdisk/fdisk.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/fdisk/fdisk.c b/fdisk/fdisk.c index 196f76d4b..09efd1cc2 100644 --- a/fdisk/fdisk.c +++ b/fdisk/fdisk.c @@ -1076,9 +1076,7 @@ update_sector_offset(void) * * b) or default to 1MiB (2048 sectrors, Windows Vista default) * - * c) or for very small devices use 1 phy.sector (small device = - * device where the offset is quarter of of whole size - * of the device). + * c) or for very small devices use 1 phy.sector */ unsigned long long x = 0; @@ -1094,12 +1092,17 @@ update_sector_offset(void) sector_offset = x / sector_size; + /* don't use huge offset on small devices */ if (total_number_of_sectors <= sector_offset * 4) sector_offset = phy_sector_size / sector_size; /* use 1MiB grain always when possible */ if (grain < 2048 * 512) grain = 2048 * 512; + + /* don't use huge grain on small devices */ + if (total_number_of_sectors <= (grain * 4 / sector_size)) + grain = phy_sector_size; } } |