kern/123095 kern/131602 sendfile

[Eugene Perevyazko]

On Wed, Jul 07, 2010 at 10:24:41AM -0700, Ming Fu wrote:
> Hi,
> 
> 
> I was trying to use sendfile and hit with problem very similar to the
> 123095 and 131602. 
> It seems that when the file is large enough (in megs), the file can be
> corrupted even if it is open read-only and exist on disk as read-only
> file, though the filesystem is mounted read-write.
> 
[skipped]
> 
> I run this on 8.0-RELEASE. The same happens on 7.2 and 6.3. The disk are
> SATA ide. I run all these command under unprivileged user account. I
> also run the same program on several different hardware, the result is
> the same. Although the corrupted file is not the same. The corruption
> looks random to me.
> 

I have this problem on 7.2-S for pretty long time. But as I sendfile() very 
small file (several hundred bytes) from flash I was blaming faulty flash stick.
I've even made a crontab entry to replace corrupted file.
So the problem seems to be probabilistic, depending on amount of transferred data.

-- 
Eugene Perevyazko