title: How can kdump reliably write into /var/crash
body: <p>I am not clear why kdump can write reliably into /var/crash when the file system might not be in a clean state.  Are the Linux ext2/3/4 file systems highly immune to file system corruption during crash?</p>
  
  <p>The underlying file system could have been corrupt under the crashed kernel.  Writing vmcore directly under the dump-capture kernel into such a file system seems dangerous ... even if you run fsck or flush the file system cache from within the crashed kernel's address space.</p>