| commit | d5a29c7a36958ddec1ae7ab685ce09a002356548 | |
| author | Manish Ahuja <ahuja@austin.ibm.com> | |
| Fri, 21 Mar 2008 23:39:17 +0000 (22 10:39 +1100) | ||
| committer | Paul Mackerras <paulus@samba.org> | |
| Tue, 25 Mar 2008 21:44:06 +0000 (26 08:44 +1100) | ||
| tree | 658282c0e2154e000e46c3fc4fbfd97ccae97fd8 | treesnapshot (tar.gz zip) |
| parent | 6ac26c8a7eb149dbd669cc6cd9b77ffc9cd0d2fb | commitdiff |
[POWERPC] pseries: phyp dump: Use sysfs to release reserved mem
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>
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>
| arch/powerpc/platforms/pseries/phyp_dump.c | diffblobblamehistory |