Messages in this thread | | | Date | Fri, 19 Mar 2004 11:05:45 +0300 | From | Hans Reiser <> | Subject | Re: True fsync() in Linux (on IDE) |
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Chris Mason wrote:
>On Thu, 2004-03-18 at 16:09, Peter Zaitsev wrote: > > >>On Thu, 2004-03-18 at 13:02, Chris Mason wrote: >> >> >> >>>>In the former case cache is surely not flushed. >>>> >>>> >>>> >>>Hmmm, is it reiser? For both 2.4 reiserfs and ext3, the flush happens >>>when you commit. ext3 always commits on fsync and reiser only commits >>>when you've changed metadata. >>> >>> >>Oh. Yes. This is Reiser, I did not think it is FS issue. >>I'll know to stay away from ReiserFS now. >> >> > >For reiserfs data=ordered should be enough to trigger the needed >commits. If not, data=journal. Note that neither fs does barriers for >O_SYNC, so we're just not perfect in 2.4. > >-chris > > >- >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/ > > > > You are not listening to Peter. As I understand it from what Peter says and your words, your implementation is wrong, and makes fsync meaningless. If so, then you need to fix it. fsync should not be meaningless even for metadata only journaling. This is a serious bug that needs immediate correction, if Peter and I understand it correctly from your words.
-- Hans
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