[Bug 54551] New: write fails with one short >2GB write.

[Bug 54551] New: write fails with one short >2GB write.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=54551

           Summary: write fails with one short >2GB write.
           Product: File System
           Version: 2.5
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: ext4
        AssignedTo: fs_ext4@kernel-bugs.osdl.org
        ReportedBy: meetmehiro@gmail.com
        Regression: No


Hi,

I have one application where we are writing on-short 3G of data but when write
succeed, it writes only 2G of data.

simple program.

if ( (ret = write(fd,buf,3221225472)) != limit) {

printf("\nError no:=%d",errno);
printf("\nret : %d",ret);
}

in above program, write only writes 2GB data..

could you please tell me, how to resolve this..

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[Bug 54551] write fails with one short >2GB write.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=54551





--- Comment #1 from meetmehiro@gmail.com  2013-02-27 14:51:38 ---
is it like, "MAX_RW_COUNT" limit is 2G ?????

is there any way, we can bypass this limit, pls help me out into this..

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[Bug 54551] write fails with one short >2GB write.

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=54551


Jan Kara <jack@suse.cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jack@suse.cz
         AssignedTo|fs_ext4@kernel-bugs.osdl.or |jack@suse.cz
                   |g                           |




--- Comment #2 from Jan Kara <jack@suse.cz>  2013-03-01 09:20:51 ---
You cannot easily overcome this limit. Also I'd note that POSIX does not say
how much is going to be written. So you have to be prepared for the fact that
your write writes e.g. 1 byte (although in practice that doesn't tend to
happen). If some program relies on write(2) writing as much as it was told to,
it is a buggy program.

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