-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 A: http://en.wikipedia.org/wiki/Top_post Q: Were do I find info about this thing called top-posting? A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? A: No. Q: Should I leave quotations after my reply? On Wed, May 30, 2007 at 06:45:52PM +0530, Dinesh K B wrote: > But still if we see the writes happening at the end of I/O for each we see > that ext2 > dispatches in terms of 1024 sectors only which least need to be > merged, Sorry, I don't understand what you mean, please rephrase it. > But the ext3 produces I/O in 4 sectors that are eventually > merged to form a bigger IO. This can been seen from the merged > count in ext2 and ext3. I doubt if it was been writing journal at that > time the I/O could not be merged. > But we see that happening in case of ext3. The whole point of journalling is that you want to have the on-disk metadata in a consistent state. In order to do that, the kernel makes sure that all writes to the journal are flushed to disk. The IO schedulers don't merge writes over a flush. BTW, a much better place to discuss this is the linux-ext4 mailing list, where all ext[234] people hang out. Erik - -- They're all fools. Don't worry. Darwin may be slow, but he'll eventually get them. -- Matthew Lammers in alt.sysadmin.recovery -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFGXYHs/PlVHJtIto0RAgUWAJwP/TWzKtULABLA6Dud/khDsw7JFACcDnUG elcyM7994qUTq1f+AqRQyl0= =dNA/ -----END PGP SIGNATURE----- -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
