diff options
| author | Song Shuai <songshuaishuai@tinylab.org> | 2023-06-24 06:26:07 +0300 |
|---|---|---|
| committer | Mike Rapoport (IBM) <rppt@kernel.org> | 2023-09-28 09:04:33 +0300 |
| commit | e96c6b8f212a510c9b22362de519f6e1d7920de5 (patch) | |
| tree | d6cbd48a68c88d396566a23681a0a370fc5af5d2 /Documentation/riscv/hwprobe.rst | |
| parent | 6465e260f48790807eef06b583b38ca9789b6072 (diff) | |
| download | linux-e96c6b8f212a510c9b22362de519f6e1d7920de5.tar.xz | |
memblock: report failures when memblock_can_resize is not set
The callers of memblock_reserve() do not check the return value
presuming that memblock_reserve() always succeeds, but there are
cases where it may fail.
Having numerous memblock reservations at early boot where
memblock_can_resize is unset may exhaust the INIT_MEMBLOCK_REGIONS sized
memblock.reserved regions array and an attempt to double this array via
memblock_double_array() will fail and will return -1 to the caller.
When this happens the system crashes anyway, but it's hard to identify
the reason for the crash.
Add a panic message to memblock_double_array() to aid debugging of the
cases when too many regions are reserved before memblock can resize
memblock.reserved array.
Link: https://lore.kernel.org/linux-kernel/20230614131746.3670303-1-songshuaishuai@tinylab.org/
Signed-off-by: Song Shuai <songshuaishuai@tinylab.org>
Link: https://lore.kernel.org/r/20230624032607.921173-1-songshuaishuai@tinylab.org
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
Diffstat (limited to 'Documentation/riscv/hwprobe.rst')
0 files changed, 0 insertions, 0 deletions