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Date: Thu, 07 Sep 2006 20:21:27 +0400 From: Michael Tokarev <mjt@....msk.ru> To: Linux-kernel <linux-kernel@...r.kernel.org> Subject: re-reading the partition table on a "busy" drive Currently, the kernel refuses to re-read partition table from a drive which has usage count > 0. Motivation for this is pretty clear (to not mess up with already open devices/partitions/filesystems, if I got it right ;), but this also is pretty annoying -- in order to change unrelated, yet unused partitions on root drive, one has to reboot the machine. I wonder if it's possible to actually read the new partition table, compare it with previous, and apply changes IF they don't conflict with currently open partitions? Say, if we have sda1 and sda2, sda1 is open/mounted, and new partition table does not have sda2, but sda1 is unchanged - it's pretty safe to apply new partition table, without affecting mounted sda1. Ditto for adding new partitions. Yes, a line should be drawn somewhere - say, if sda3 was mounted, and we removed unused sda2, but sda3 (which becomes sda2 with new table) is intact, we should not apply new table. Is it possible to implement such a feature? I mean, is it easy to know which *partitions* (subdevices?) of the whole device are currently in use, as opposed to the whole drive? Thanks. /mjt - 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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