On Sun, 31 Dec 2000, Alexander Viro wrote: > > On Sun, 31 Dec 2000, Linus Torvalds wrote: > > > The other thing is that one of the common cases for writing is consecutive > > writing to the end of the file. Now, you figure it out: if get_block() > > really is a bottle-neck, why not cache the last tree lookup? You'd get a > > 99% hitrate for that common case. > > Because it is not a bottleneck. The _real_ bottleneck is in ext2_new_block(). > Try to profile it and you'll see. > > We could diddle with ext2_get_block(). No arguments. But the real source of > PITA is balloc.c, not inode.c. Look at the group descriptor cache code and > weep. That, and bitmaps handling. I'm not surprised. Just doign pre-allocation 32 blocks at a time would probably help. But that code really should be re-written, I think. Linus - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
- Re: [RFC] Generic deferred file... Andrea Arcangeli
- Re: [RFC] Generic deferred file... Roman Zippel
- Re: [RFC] Generic deferred file... Linus Torvalds
- Re: [RFC] Generic deferred file... Roman Zippel
- Races in affs_unlink(), affs_rm... Alexander Viro
- Re: Races in affs_unlink(), aff... Roman Zippel
- Re: [RFC] Generic deferred file... Andrea Arcangeli
- Re: [RFC] Generic deferred file... Linus Torvalds
- Re: [RFC] Generic deferred file... Andrea Arcangeli
- Re: [RFC] Generic deferred file... Alexander Viro
- Re: [RFC] Generic deferred file... Linus Torvalds
- Re: [RFC] Generic deferred file... Daniel Phillips
- Re: [RFC] Generic deferred file... Linus Torvalds
- Re: [RFC] Generic deferred file... Daniel Phillips
- Re: [RFC] Generic deferred file... Linus Torvalds
- Re: [RFC] Generic deferred file... Roman Zippel
- Re: [RFC] Generic deferred file... Linus Torvalds
- Re: [RFC] Generic deferred file... Chris Mason
- Re: test13-pre6 (Fork Bug with Athlons? Temporary Fix) Byron Stanoszek
- Re: test13-pre6 (Fork Bug with Athlons? Temporary Fi... Linus Torvalds