Messages in this thread | | | Date | Tue, 20 May 2008 00:37:52 +0400 | From | Alexey Dobriyan <> | Subject | Re: ext4-mm-delalloc-ext4-lock-reverse-fix |
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On Mon, May 19, 2008 at 05:24:47PM +0200, Jiri Slaby wrote: > Andrew Morton <akpm@linux-foundation.org> wrote: > > On Mon, 19 May 2008 15:15:09 +0800 "Dave Young" <hidave.darkstar@gmail.com> wrote: > > > > > With 2.6.26-rc2-mm1 I need to sync frequently. It's not normal as my > > > understanding. > > > > > > 1. scp a big file from a lan server. Firstly the speed is about 8M/s, > > > but the speed will slow down to 100K/s at last. After I exec "sync", > > > the speed will restore. > > > > > > Is this a known issue? > > > > > > > Yes, probably related to the "mkfs takes forever" problem. I haven't > > looked into it yet. Nor has anyone else afaik. > > Absolutely not sure what this breaks in ext4, but fixes the problem for me:
This helps, thank you!
> --- a/mm/page-writeback.c > +++ b/mm/page-writeback.c > @@ -881,7 +881,7 @@ int write_cache_pages(struct address_space *mapping, > pagevec_init(&pvec, 0); > if (wbc->range_cyclic) { > index = mapping->writeback_index; /* Start from prev offset */ > - end = wbc->range_end >> PAGE_CACHE_SHIFT; > + end = -1; > } else { > index = wbc->range_start >> PAGE_CACHE_SHIFT; > end = wbc->range_end >> PAGE_CACHE_SHIFT;
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