George Kola wrote: > I am using RHEL (CentOS) 5.5 with kernel 2.6.18-194.17.4.el5 and ext4. I > posted to RHEL bugzilla and they requested me to post it here. > ... > Steps to Reproduce: > Have a program > 1. Open a file on ext4 partition # touch testfile > 2. Fallocate space for that file say 20 GB # /root/fallocate -l 20g testfile # df -h . Filesystem Size Used Avail Use% Mounted on /dev/sdb2 30G 21G 7.7G 73% /mnt/test # du -h testfile 21G testfile > 3. Write data to the file (but less than the allocated space) say 10 GB # dd if=/dev/zero of=testfile bs=10M count=1024 conv=notrunc 10737418240 bytes (11 GB) copied, 125.522 seconds, 85.5 MB/s # du -h testfile 21G testfile # df -h . Filesystem Size Used Avail Use% Mounted on /dev/sdb2 30G 21G 7.7G 73% /mnt/test > 4. Close the file > 5. Call truncate(file-path, size+1), truncate(file-path,size) on that file > to > give up the space (observed that the space is given up using filefrag) 10g size I assume? Is the below representative? # /root/truncate 10737418241 testfile # ls -l testfile -rw-r--r-- 1 root root 10737418241 Oct 29 13:48 testfile # /root/truncate 10737418240 testfile # ls -l testfile -rw-r--r-- 1 root root 10737418240 Oct 29 13:48 testfile > 6. Use du and df on that ext4 partition to find that the mismatch # df -h . Filesystem Size Used Avail Use% Mounted on /dev/sdb2 30G 11G 18G 37% /mnt/test # du -h testfile 11G testfile # uname -a Linux bear-05 2.6.18-225.el5 #1 SMP Mon Sep 27 10:32:19 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux Seems to work here, though there are ext4 updates in that kernel. -Eric > > > -George > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-ext4" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
