lkml.org 
[lkml]   [2006]   [Feb]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: Flames over -- Re: Which is simpler?
    Pavel Machek wrote:
    >
    > Must?! Are you Linus or what?
    >

    Non sequitur.

    >
    > You are missing this. In 1st case, no data is actually lost, because of
    > sync in suspend code;
    > while second case is "goodbye, filesystem".

    Provided that you sync before suspending, and there are no open files on
    the filesystem, then yes, no data will be lost. If there are open files
    on the fs, such as a half saved document, or a running binary, or say,
    the whole root fs, then you're going to loose data and even panic the
    kernel, sync or no sync. From the user perspective, this is unacceptable.


    Why should the user give up such functionality just because the
    connection to the drive thy are using is USB? Every other type of drive
    and interface does not suffer from this problem.

    Maybe Linux should take a page from windows' playbook here. I believe
    windows handles this scenario with a USB drive the same way it does when
    you eject a floppy and reinsert it. The driver detects that the
    media/drive _may_ have changed and so it fails requests from the
    filesystem with an error code indicating this. The filesystem then sets
    an override flag so it can send down some reads to verify the media.
    Generally the FS reads the super block and compares it with the in
    memory one to make sure it appears to be the same media, and if so,
    continues normal access without data loss.

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2006-02-18 17:37    [W:4.114 / U:0.136 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site