2009/9/12 Rafael J. Wysocki <rjw@xxxxxxx>: > On Saturday 12 September 2009, Chris Ball wrote: >> Hi, >> >> > Well system could check basic card ids if they match after resume >> >> No. That (arguably) guarantees that it's the same card, but not that >> it wasn't modified in another machine during the suspend. > > Generally speaking, we'd also need to check superblocks for this to work. > >> > if some users wants to crash his card by randomly swapping it >> > during suspend/resume - I'd have no problem with that.... >> >> You should have a problem with it. Taking a card from a suspended >> machine and working on it with a different machine is not a bizarre >> thing to want to do. > > Agreed. Well - ok - so let me ask this question - if I'll replace local hard drive during suspend - what will happen - is this prohibited by hw (e.i. to switch SATA cables) ? IMHO filesystem should be able to detect corruption of its data structures - (assuming fs is notified about suspend/resume operation) Also there could be one simple quick solution/hack - to require to have at least all remote drives unmounted - so suspend would be refused if it runs mounted card/usb drive - this would be 100% better than current solution which effectively kills my laptop if I forget to unmount card in mmc reader - especially if dmesg contains message with the reason why my suspend fails. Zdenek -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
