Followup to: <11640000.1050332688@[10.10.2.4]>
By author: "Martin J. Bligh" <mbligh@aracnet.com>
In newsgroup: linux.dev.kernel
>
> > Martin, something which was not mentioned last week (I've just checked).
> >
> > It's OK if we never write to disk unless explicitely told, but will we writeback
> > when we munmap?
>
> Don't know for sure - you'd have to read the code (do_munmap) ... I couldn't
> see anything there at a quick glance. However, I'd guess we don't write it,
> as multiple people could have the file mapped, or we could remap it
> again from somewhere. Presumably the standard LRU will just flush it out.
>
munmap() and fsync() or msync() will flush it to disk; there is no
reason munmap() should unless perhaps the file was opened O_SYNC.
-hpa
-- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot." Architectures needed: ia64 m68k mips64 ppc ppc64 s390 s390x sh v850 x86-64 - 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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