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| author | Stephen Rothwell <sfr@canb.auug.org.au> | 2015-10-07 12:08:03 +1100 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2015-10-07 12:08:03 +1100 |
| commit | bdec6aae70588bc53d64746818091727c136df7f (patch) | |
| tree | 9db6a1a368abc2625f4a1c5e3ca39fac8c3d13c2 /Documentation/kernel-parameters.txt | |
| parent | d5d72f592740349f3aee29c708c341163cf1993e (diff) | |
| parent | b479bfd00e463034a73a9894d4f6d87988cbc559 (diff) | |
Merge remote-tracking branch 'jc_docs/docs-next'
Diffstat (limited to 'Documentation/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index c6dd5f350684..31d4b5202b12 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -789,8 +789,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. is passed, kernel could allocate physical memory region above 4G, that cause second kernel crash on system that require some amount of low memory, e.g. swiotlb - requires at least 64M+32K low memory. Kernel would - try to allocate 72M below 4G automatically. + requires at least 64M+32K low memory, also enough extra + low memory is needed to make sure DMA buffers for 32-bit + devices won't run out. Kernel would try to allocate at + at least 256M below 4G automatically. This one let user to specify own low range under 4G for second kernel instead. 0: to disable low allocation. @@ -974,6 +976,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. earlycon= [KNL] Output early console device and options. + When used with no options, the early console is + determined by the stdout-path property in device + tree's chosen node. + cdns,<addr> Start an early, polled-mode console on a cadence serial port at the specified address. The cadence serial port |