Re: sendfile -EOVERFLOW on AMD64

[Jan Kasprzak <kas@informatics.muni.cz>]

Andi Kleen wrote:
: Jan Kasprzak <kas@informatics.muni.cz> writes:
: >
: > The image (FC2-i386-DVD.iso) has 4370640896 bytes. The FTP server is native
: > x86_64 binary, not a 32-bit one.
: 
: sys_sendfile limits itself dumbly to 2GB even on 64bit architectures.
: This patch should fix it on x86-64, although other 64bit ports may 
: need a similar patch. Just removing the limit in read_write 
: is not easy, because it would need fixes in all the 32bit emulation
: layers.
: 
	It partly helped, thanks. But there is still one more problem
- it looks like sendfile() returns 32-bit value instead of 64-bit.
My debug info looks like this:

sendfile(offset=0, count=4370640896)
    = -767073160, offset=3527894136

where I do

	long val = sendfile(...); printf(...%ld..., val);

-Yenya


-- 
| Jan "Yenya" Kasprzak  <kas at {fi.muni.cz - work | yenya.net - private}> |
| GPG: ID 1024/D3498839      Fingerprint 0D99A7FB206605D7 8B35FCDE05B18A5E |
| http://www.fi.muni.cz/~kas/   Czech Linux Homepage: http://www.linux.cz/ |
 Any compiler or language that likes to hide things like memory allocations
 behind your back just isn't a good choice for a kernel.   --Linus Torvalds