c8fa31730f
Because of the direct_access() API which returns a PFN. partitions better start on 4K boundary, else offset ZERO of a partition will not be aligned and blk_direct_access() will fail the call. By setting blk_queue_physical_block_size(PAGE_SIZE) we can communicate this to fdisk and friends. The call to blk_queue_physical_block_size() is harmless and will not affect the Kernel behavior in any way. It is only for communication to user-mode. before this patch running fdisk on a default size brd of 4M the first sector offered is 34 (BAD), but after this patch it will be 40, ie 8 sectors aligned. Also when entering some random partition sizes the next partition-start sector is offered 8 sectors aligned after this patch. (Please note that with fdisk the user can still enter bad values, only the offered default values will be correct) Note that with bdev-size > 4M fdisk will try to align on a 1M boundary (above first-sector will be 2048), in any case. CC: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Boaz Harrosh <boaz@plexistor.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <axboe@fb.com> |
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.. | ||
aoe | ||
drbd | ||
mtip32xx | ||
paride | ||
rsxx | ||
xen-blkback | ||
zram | ||
amiflop.c | ||
ataflop.c | ||
brd.c | ||
cciss.c | ||
cciss.h | ||
cciss_cmd.h | ||
cciss_scsi.c | ||
cciss_scsi.h | ||
cpqarray.c | ||
cpqarray.h | ||
cryptoloop.c | ||
DAC960.c | ||
DAC960.h | ||
floppy.c | ||
hd.c | ||
ida_cmd.h | ||
ida_ioctl.h | ||
Kconfig | ||
loop.c | ||
loop.h | ||
Makefile | ||
mg_disk.c | ||
nbd.c | ||
null_blk.c | ||
nvme-core.c | ||
nvme-scsi.c | ||
osdblk.c | ||
pktcdvd.c | ||
ps3disk.c | ||
ps3vram.c | ||
rbd.c | ||
rbd_types.h | ||
skd_main.c | ||
skd_s1120.h | ||
smart1,2.h | ||
sunvdc.c | ||
swim.c | ||
swim3.c | ||
swim_asm.S | ||
sx8.c | ||
umem.c | ||
umem.h | ||
virtio_blk.c | ||
xen-blkfront.c | ||
xsysace.c | ||
z2ram.c |