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    fs: make cont_expand_zero interruptible · c2ca0fcd
    Mikulas Patocka 提交于
    This patch makes it possible to kill a process looping in
    cont_expand_zero. A process may spend a lot of time in this function, so
    it is desirable to be able to kill it.
    
    It happened to me that I wanted to copy a piece data from the disk to a
    file. By mistake, I used the "seek" parameter to dd instead of "skip". Due
    to the "seek" parameter, dd attempted to extend the file and became stuck
    doing so - the only possibility was to reset the machine or wait many
    hours until the filesystem runs out of space and cont_expand_zero fails.
    We need this patch to be able to terminate the process.
    Signed-off-by: NMikulas Patocka <mpatocka@redhat.com>
    Cc: stable@vger.kernel.org
    Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
    c2ca0fcd
buffer.c 88.8 KB