Messages in this thread |  | | Date | Mon, 29 Oct 2001 18:53:14 -0800 | From | Andrew Morton <> | Subject | Re: i/o stalls on 2.4.14-pre3 with ext3 |
| |
David Mansfield wrote: > > I tried out 2.4.14-pre3 plus the ext3 patch from Andrew Morton and > encountered some strange I/O stalls. I was doing a 'cvs tag' of my local > kernel-cvs repository, which generates a lot of read/write traffic in a > single process.
hmm.. Thanks - I'll do some metadata-intensive testing.
ext3's problem is that it is unable to react to VM pressure for metadata (buffercache) pages. Once upon a time it did do this, but we backed it out because it involved mauling core kernel code. So at present we only react to VM pressure for data pages.
Now that metadata pages have a backing address_space, I think we can again allow ext3 to react to VM pressure against metadata. It'll take some more mauling, but it's good mauling ;)
Then again, maybe something got broken in the buffer writeout code or something.
Is this repeatable?
while true do cvs tag foo cvs tag -d foo done
If so, can you run `top' in parallel, see if there's anything suspicious happening? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |