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Date: Tue, 24 Nov 2009 09:26:51 +0100 From: Jens Axboe <jens.axboe@...cle.com> To: Karel Zak <kzak@...hat.com> Cc: linux-kernel@...r.kernel.org Subject: Re: [PATCH 1/2] partitions: use sector size for EFI GPT On Mon, Nov 09 2009, Karel Zak wrote: > Currently, kernel uses strictly 512-byte sectors for EFI GPT parsing. > That's wrong. > > UEFI standard (version 2.3, May 2009, 5.3.1 GUID Format overview, page > 95) defines that LBA is always based on the logical block size. It > means bdev_logical_block_size() (aka BLKSSZGET) for Linux. > > This patch removes static sector size from EFI GPT parser. > > The problem is reproducible with the latest GNU Parted: > > # modprobe scsi_debug dev_size_mb=50 sector_size=4096 > > # ./parted /dev/sdb print > Model: Linux scsi_debug (scsi) > Disk /dev/sdb: 52.4MB > Sector size (logical/physical): 4096B/4096B > Partition Table: gpt > > Number Start End Size File system Name Flags > 1 24.6kB 3002kB 2978kB primary > 2 3002kB 6001kB 2998kB primary > 3 6001kB 9003kB 3002kB primary > > # blockdev --rereadpt /dev/sdb > # dmesg | tail -1 > sdb: unknown partition table <---- !!! > > with this patch: > > # blockdev --rereadpt /dev/sdb > # dmesg | tail -1 > sdb: sdb1 sdb2 sdb3 > > Signed-off-by: Karel Zak <kzak@...hat.com> I have applied this patch with the division fixup, and 2/2 as well. Thanks! -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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