Am 24.10.2016 um 13:00 schrieb Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>: > - Fix document title; > - use quote blocks where needed; > - use monotonic fonts for config options and file names; > - adjust whitespaces and blank lines; > - add it to the user's book. > > Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx> > --- > Documentation/ramoops.txt | 86 ++++++++++++++++++++++++++--------------------- > 1 file changed, 47 insertions(+), 39 deletions(-) > > diff --git a/Documentation/ramoops.txt b/Documentation/ramoops.txt > index 26b9f31cf65a..7eaf1e71c083 100644 > --- a/Documentation/ramoops.txt > +++ b/Documentation/ramoops.txt > @@ -5,34 +5,37 @@ Sergiu Iordache <sergiu@xxxxxxxxxxxx> > > Updated: 17 November 2011 > > -0. Introduction > +Introduction > +------------ > > Ramoops is an oops/panic logger that writes its logs to RAM before the system > crashes. It works by logging oopses and panics in a circular buffer. Ramoops > needs a system with persistent RAM so that the content of that area can > survive after a restart. > > -1. Ramoops concepts > +Ramoops concepts > +---------------- > > Ramoops uses a predefined memory area to store the dump. The start and size > and type of the memory area are set using three variables: > - * "mem_address" for the start > - * "mem_size" for the size. The memory size will be rounded down to a > - power of two. > - * "mem_type" to specifiy if the memory type (default is pgprot_writecombine). > > -Typically the default value of mem_type=0 should be used as that sets the pstore > -mapping to pgprot_writecombine. Setting mem_type=1 attempts to use > -pgprot_noncached, which only works on some platforms. This is because pstore > + * ``mem_address`` for the start > + * ``mem_size`` for the size. The memory size will be rounded down to a > + power of two. > + * ``mem_type`` to specifiy if the memory type (default is pgprot_writecombine). > + > +Typically the default value of ``mem_type=0`` should be used as that sets the pstore > +mapping to pgprot_writecombine. Setting ``mem_type=1`` attempts to use > +``pgprot_noncached``, which only works on some platforms. This is because pstore > depends on atomic operations. At least on ARM, pgprot_noncached causes the > memory to be mapped strongly ordered, and atomic operations on strongly ordered > memory are implementation defined, and won't work on many ARMs such as omaps. > > -The memory area is divided into "record_size" chunks (also rounded down to > -power of two) and each oops/panic writes a "record_size" chunk of > +The memory area is divided into ``record_size`` chunks (also rounded down to > +power of two) and each oops/panic writes a ``record_size`` chunk of > information. > > -Dumping both oopses and panics can be done by setting 1 in the "dump_oops" > +Dumping both oopses and panics can be done by setting 1 in the ``dump_oops`` > variable while setting 0 in that variable dumps only the panics. > > The module uses a counter to record multiple dumps but the counter gets reset > @@ -43,7 +46,8 @@ This might be useful when a hardware reset was used to bring the machine back > to life (i.e. a watchdog triggered). In such cases, RAM may be somewhat > corrupt, but usually it is restorable. > > -2. Setting the parameters > +Setting the parameters > +---------------------- > > Setting the ramoops parameters can be done in several different manners: > > @@ -52,12 +56,13 @@ Setting the ramoops parameters can be done in several different manners: > boot and then use the reserved memory for ramoops. For example, assuming a > machine with > 128 MB of memory, the following kernel command line will tell > the kernel to use only the first 128 MB of memory, and place ECC-protected > - ramoops region at 128 MB boundary: > - "mem=128M ramoops.mem_address=0x8000000 ramoops.ecc=1" > + ramoops region at 128 MB boundary:: > + > + mem=128M ramoops.mem_address=0x8000000 ramoops.ecc=1 > > B. Use Device Tree bindings, as described in > - Documentation/device-tree/bindings/reserved-memory/ramoops.txt. > - For example: > + ``Documentation/device-tree/bindings/reserved-memory/ramoops.txt``. > + For example:: > > reserved-memory { > #address-cells = <2>; > @@ -73,60 +78,63 @@ Setting the ramoops parameters can be done in several different manners: > }; > > C. Use a platform device and set the platform data. The parameters can then > - be set through that platform data. An example of doing that is: > + be set through that platform data. An example of doing that is:: > The A., B. and C. line should be indented better e.g.:: - C. Use a platform device and set the platform data. The parameters can then - be set through that platform data. An example of doing that is:: + C. Use a platform device and set the platform data. The parameters can then + be set through that platform data. An example of doing that is:: -- Markus -- -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html