the active tasks in the kernel's per-cpu crash_notes, there is an
initialization-time warning message indicating "could not retrieve
crash_notes". It has been changed to a more meaningful warning
message indicating "cannot retrieve registers for active tasks".
(anderson@redhat.com)
kernel's VA_BITS value. It currently is hardwired in the kernel to
one of two values depending upon whether 4K or 64K pages are
configured. However, there are plans to support 16K paqes, to make
VA_BITS a configurable value, and to make the number of page-table
levels configurable. Towards that end, the crash utility has been
changed to determine the VA_BITS value based upon known kernel
virtual addresses, and to then calculate the relevant kernel virtual
address ranges on that value instead of hardwiring them based upon
the page size.
(anderson@redhat.com)
extension module, do not attempt to read the crash_notes. Since the
dumpfile was taken while running on a live system, the crash_notes,
if configured into the kernel, would not contain valid data. Without
the patch, the message "WARNING: could not retrieve crash_notes" is
displayed during session initialization.
(anderson@redhat.com)
that begin with "__crc_". Without the patch, several thousand of
them may be displayed by "sym -l" prior to the first kernel virtual
address symbol.
(anderson@redhat.com)
with 64K pages if the address argument is located in the kernel
logical memory map region, which uses 512MB hugepage mappings.
Without the patch, the verbose page table walk mistakenly continues
to the PTE level.
(anderson@redhat.com)
properly translated to the filename and offset. Without the patch,
file-backed pages are erroneously shown as being backed on a swap
device.
(anderson@redhat.com)
structure addresses for kernels configured with 4K pages. Without
the patch, any command that required the contents of a page structure
would fail with a readmem error.
(cldu@marvell.com, anderson@redhat.com)
several command options still under development. In-kernel exception
frames are only dumped if the exception handler function is contained
within the symbol boundaries from "__exception_text_start" to
"__exception_text_end"; when ARM64 kdump is eventually implemented,
further exception-related work will be resumed.
(anderson@redhat.com)
kernels that expand to a 42-bit address space when 64K pages are
configured. This is also the first crash version that has been
tested on a live ARM64 system with 4K pages, where it cleanly
make it to the "crash>" prompt. However, it should be noted that
some commands (most notably "bt") still do not work as of yet.
(anderson@redhat.com)
