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author | Yinghai Lu <yinghai@kernel.org> | 2014-08-09 01:23:12 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-09 02:57:26 +0400 |
commit | 38747439914c468ecba70b492b54dc4ef0b50453 (patch) | |
tree | dbb80c9d8c7be76a8a0483c5ec7a271361162429 /include/linux/serio.h | |
parent | 4d4b866aee039d609c0b40e7e5b27204607ce614 (diff) | |
download | linux-38747439914c468ecba70b492b54dc4ef0b50453.tar.xz |
initramfs: support initrd that is bigger than 2GiB
When initrd (compressed or not) is used, kernel report data corrupted with
/dev/ram0.
The root cause:
During initramfs checking, if it is initrd, it will be transferred to
/initrd.image with sys_write.
sys_write only support 2G-4K write, so if the initrd ram is more than
that, /initrd.image will not complete at all.
Add local xwrite to loop calling sys_write to workaround the problem.
Also need to use xwrite in write_buffer() to handle:
image is uncompressed cpio and there is one big file (>2G) in it.
unpack_to_rootfs ===> write_buffer ===> actions[]/do_copy
At the same time, we don't need to worry about sys_read/sys_write in
do_mounts_rd.c::crd_load. As decompressor will have fill/flush and local
buffer that is smaller than 2G.
Test with uncompressed initrd, and compressed ones with gz, bz2, lzma,xz,
lzop.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: "Daniel M. Weeks" <dan@danweeks.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/serio.h')
0 files changed, 0 insertions, 0 deletions