Messages in this thread | | | Date | Fri, 01 Feb 2002 12:44:29 -0800 | From | Andrew Morton <> | Subject | Re: O_DIRECT fails in some kernel and FS |
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Ricardo Galli wrote: > > After some comments from Oliver Diedrich (editor of heise.de), which told me > he couldn't make O_DIRECT work on 2.4.17, I tried with different versions and > file systems: > > This is the result: > > 2.4.14 - Ext[23] - redhat7.2 glibs: OK (at least the bytes are written) > 2.4.17 - ReiserFS - Debian Sid : FAILS (0 bytes file, write returns -1) > 2.4.17 - Ext2 - Debian Woody : OK (bytes written) > 2.4.17 - Ext3 - Debian Woody : FAILS (0 bytes file, write returns -1) > > Oliver Diedrich also told he could make work O_DIRECT with ext3 and 2.4.17. > > Is this normal? Does it really work on 2.4.14? Or it doesn't but the kernel > doesn't avoid caching? >
ext2 is the only filesystem which has O_DIRECT support.
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