Messages in this thread | | | Date | Thu, 19 Mar 2009 13:05:52 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: ftruncate-mmap: pages are lost after writing to mmaped file. |
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On Thu, 19 Mar 2009, Jan Kara wrote: > > > > Ahh, so you re-created it? On ext2 only, or is it visible on ext3 as well? > > I've not even tested - I assumed that I would have to boot into less > > memory and downgrade my filesystem to ext2, which made me hope somebody > > else would pick it up first ;) > > In thread http://lkml.org/lkml/2009/3/4/179 I've reported similar problem > - write lost. I'm able to reproduce under UML linux at will. ext3 takes > with 1KB blocksize about 20 minutes to hit the corruption, ext2 with 1 KB > blocksize about an hour, ext2 with 4KB blocksize several hours...
Hmm. I can't seem to recreate it with Ying Han's testprog, at least. That's with the fs/buffer.c patch applied, but that shouldn't matter since Nick reports that his (roughly equivalent) patch didn't help.
I'll continue to run it for a while, but it's been going for about an hour now, with vmstat reporting bo/bi at roughly 5-10MB/s pretty continuosly.
Of course, that's with my SSD's and an insanely fast Nehalem box, so my timings are likely rather different from most other peoples.
Linus
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