[POWERPC] pseries: phyp dump: Use sysfs to release reserved mem

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Check to see if there actually is data from a previously
crashed kernel waiting.  If so, allow user-space tools to
grab the data (by reading /proc/kcore).  When user-space
finishes dumping a section, it must release that memory
by writing to sysfs. For example,

  echo "0x40000000 0x10000000" > /sys/kernel/release_region

will release 256MB starting at the 1GB.  The released memory
becomes free for general use.

Signed-off-by: Linas Vepstas <linasvepstas@gmail.com>
Signed-off-by: Manish Ahuja <mahuja@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

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Manish Ahuja 2008-03-22 10:39:17 +11:00 • committed by Paul Mackerras

parent 6ac26c8a7e

commit d5a29c7a36

1 changed files with 76 additions and 5 deletions

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arch/powerpc/platforms/pseries/phyp_dump.c

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