Messages in this thread | | | Date | Thu, 13 Sep 2012 23:24:30 +0900 | Subject | Re: [PATCH v2 1/5] fat: allocate persistent inode numbers | From | Namjae Jeon <> |
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2012/9/13, OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>: > "J. Bruce Fields" <bfields@fieldses.org> writes: > >>> >> Grepping around... Documentation/sysctl/vm.txt mentions a >>> >> vfs_cache_pressure parameter. >>> >> Yeah. And dirty hack will be possible to adjust sb->s_shrink.batch. >>> > I am worrying if it could lead to OOM condition on embedded >>> > system(short memory(DRAM) and support 3TB HDD disk of big size.) >>> > >>> > Please let me know if any issues or queries. >>> >>> So, now I think stable inode number may be useful if there are users of >>> it. And I guess those functionality is no collisions with -mm. And I >>> suppose we can add two modes for "nfs" option (e.g. nfs=1 and nfs=2). >>> >>> If nfs=1, works like current -mm without no limited operations. >> >> Apologies, I haven't been following the conversation carefully: remind >> me what "works like current -mm" means? > > Current -mm means the best-effort work only if inode cache is not > evicted. I.e. if there is no inode cache anymore on server, server > would return ESTALE. So I guess the behavior would not be stable > relatively. Hi OGAWA. Sorry for late response. Okay, I will resend patchset include your suggeston.(-o nfs=2) Do you mind adding busy list patch to avoid unlink issue ? And in case of rename, FAT retrun EBUSY while opening file. We can limit only rename. Let me know your opinion.
Thanks OGAWA!
> > Thanks. > >>> If nfs=2, try to make stable FH and limit some operations >>> >>> (option name doesn't matter here.) >>> >>> Does this work fine? > -- > OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> >
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