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Date: Wed, 25 Jun 2014 15:23:42 +0200 From: Thomas Knauth <thomas.knauth@....de> To: Artem Bityutskiy <dedekind1@...il.com> Cc: David Rientjes <rientjes@...gle.com>, Maksym Planeta <mcsim.planeta@...il.com>, Alexander Viro <viro@...iv.linux.org.uk>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] sysctl: Add a feature to drop caches selectively On Wed, Jun 25, 2014 at 11:56 AM, Artem Bityutskiy <dedekind1@...il.com> wrote: > Thanks for the answer, although you forgot to comment on the question > about possibly extending the new interface to work with file ranges in > the future. For example, I have a 2 TiB file, and I am only interested > in dropping caches for the first couple of gigabytes. Would I extend > your interface, or would I come up with another one? Ah, didn't quite understand what was meant with file ranges. Again, we had not considered this so far. I guess you could make a distinction between directories and files here. If the path points to a file, you can have an optional argument indicating the range of bytes you would like to drop. Something like echo "my-file 0-1000,8000-1000" > /proc/sys/vm/sdrop_cache If this is desirable, we can add it to the patch. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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