Re: panic after removing usb flash drive

From: Daniel O'Connor (doconnor_at_gsoft.com.au)
Date: 08/31/05

  • Next message: Yar Tikhiy: "Re: 6.0BETA3 panic in ip_output (vlan/RIP related?)" 
    To: Eric Anderson <anderson@centtech.com>
Date: Wed, 31 Aug 2005 22:55:25 +0930

    On Wednesday 31 August 2005 22:43, Eric Anderson wrote:
    > This is where I think it would be great to have a sort of 'flashfs' -
    > something like a UFS2 filesystem, but read only until a write happens,
    > and all writes would be synchronous, and after the write occurs, the fs
    > goes back to a 'read only' state. Maybe this could be done with
    > gjournal or even unionfs - mount the usb flash read only, do all writes
    > to a memory backed disk, and then flush the writes out to the usb flash
    > periodically. Not perfect, but maybe this will stir some ideas up.

    I think if you can differentiate behaviour for normal file systems based on
    some information about the device then it would be good.

    ie if it is a removable type device the default behaviour would be to disable
    write caching and mount it synchronously. Coupled with a kernel that is
    willing to throw away pages dirtied on such a volume you would be able to
    readily hot plug a device without too much worry about data loss. 

    -- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C

  • Next message: Yar Tikhiy: "Re: 6.0BETA3 panic in ip_output (vlan/RIP related?)"

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