• Hari Bathini's avatar
    powerpc/fadump: Do not use hugepages when fadump is active · 85975387
    Hari Bathini authored
    FADump capture kernel boots in restricted memory environment preserving
    the context of previous kernel to save vmcore. Supporting hugepages in
    such environment makes things unnecessarily complicated, as hugepages
    need memory set aside for them. This means most of the capture kernel's
    memory is used in supporting hugepages. In most cases, this results in
    out-of-memory issues while booting FADump capture kernel. But hugepages
    are not of much use in capture kernel whose only job is to save vmcore.
    So, disabling hugepages support, when fadump is active, is a reliable
    solution for the out of memory issues. Introducing a flag variable to
    disable HugeTLB support when fadump is active.
    Signed-off-by: default avatarHari Bathini <hbathini@linux.vnet.ibm.com>
    Reviewed-by: default avatarMahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
    Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
    85975387
fadump.c 41.2 KB