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2115732e54
For all unrecoverable errors we are missing to log the error, Since machine_check_log_err() is not getting called for unrecoverable errors. machine_check_log_err() is called from deferred handler, To run deferred handlers we have to do irq work raise from the exception handler. For recoverable errors exception vector code takes care of running deferred handlers. For unrecoverable errors raise irq work in save_mce_event(), So that we log the error from MCE deferred handler. Log without this change MCE: CPU27: machine check (Severe) Real address Load/Store (foreign/control memory) [Not recovered] MCE: CPU27: PID: 10580 Comm: inject-ra-err NIP: [0000000010000df4] MCE: CPU27: Initiator CPU MCE: CPU27: Unknown Log with this change MCE: CPU24: machine check (Severe) Real address Load/Store (foreign/control memory) [Not recovered] MCE: CPU24: PID: 1589811 Comm: inject-ra-err NIP: [0000000010000e48] MCE: CPU24: Initiator CPU MCE: CPU24: Unknown RTAS: event: 5, Type: Platform Error (224), Severity: 3 Signed-off-by: Ganesh Goudar <ganeshgr@linux.ibm.com> Reviewed-by: Mahesh Salgaonkar <mahesh@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20230201095933.129482-1-ganeshgr@linux.ibm.com |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.