From d97b07c54f34e88352ebe676beb798c8f59ac588 Mon Sep 17 00:00:00 2001 From: Yinghai Lu <yinghai@kernel.org> Date: Fri, 8 Aug 2014 14:23:14 -0700 Subject: initramfs: support initramfs that is bigger than 2GiB Now with 64bit bzImage and kexec tools, we support ramdisk that size is bigger than 2g, as we could put it above 4G. Found compressed initramfs image could not be decompressed properly. It turns out that image length is int during decompress detection, and it will become < 0 when length is more than 2G. Furthermore, during decompressing len as int is used for inbuf count, that has problem too. Change len to long, that should be ok as on 32 bit platform long is 32bits. Tested with following compressed initramfs image as root with kexec. gzip, bzip2, xz, lzma, lzop, lz4. run time for populate_rootfs(): size name Nehalem-EX Westmere-EX Ivybridge-EX 9034400256 root_img : 26s 24s 30s 3561095057 root_img.lz4 : 28s 27s 27s 3459554629 root_img.lzo : 29s 29s 28s 3219399480 root_img.gz : 64s 62s 49s 2251594592 root_img.xz : 262s 260s 183s 2226366598 root_img.lzma: 386s 376s 277s 2901482513 root_img.bz2 : 635s 599s Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Rashika Kheria <rashika.kheria@gmail.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Kyungsik Lee <kyungsik.lee@lge.com> Cc: P J P <ppandit@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Cc: "Daniel M. Weeks" <dan@danweeks.net> Cc: Alexandre Courbot <acourbot@nvidia.com> Cc: Jan Beulich <JBeulich@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- include/linux/zlib.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux/zlib.h') diff --git a/include/linux/zlib.h b/include/linux/zlib.h index 197abb2a54c5..92dbbd3f6c75 100644 --- a/include/linux/zlib.h +++ b/include/linux/zlib.h @@ -83,11 +83,11 @@ struct internal_state; typedef struct z_stream_s { const Byte *next_in; /* next input byte */ - uInt avail_in; /* number of bytes available at next_in */ + uLong avail_in; /* number of bytes available at next_in */ uLong total_in; /* total nb of input bytes read so far */ Byte *next_out; /* next output byte should be put there */ - uInt avail_out; /* remaining free space at next_out */ + uLong avail_out; /* remaining free space at next_out */ uLong total_out; /* total nb of bytes output so far */ char *msg; /* last error message, NULL if no error */ -- cgit v1.2.3