Messages in this thread | | | Date | Fri, 22 Aug 2003 12:09:52 -0700 | From | Randolph Chung <> | Subject | Re: [parisc-linux] Re: Problems with kernel mmap (failing tst-mmap-eofsync in glibc on parisc) |
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In reference to a message from James Bottomley, dated Aug 22: > On Fri, 2003-08-22 at 13:34, Hugh Dickins wrote: > > Might the problem be in parisc's __flush_dcache_page, > > which only examines i_mmap_shared? > > This is the issue: we do treat them differently.
as does some other archs, like ARM.
are we saying that MAP_SHARED != VM_SHARED? the mmap code allows architectures to map pages differently if MAP_SHARED is specified, but it puts it on i_mmap vs i_mmap_shared using VM_SHARED, and for read-only files we silently drop VM_SHARED... so the page is mapped using MAP_SHARED semantics but placed on i_mmap....
confused, randolph -- Randolph Chung Debian GNU/Linux Developer, hppa/ia64 ports http://www.tausq.org/ - 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/
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