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Date: Sun, 8 Feb 2015 00:18:34 +0900 From: Akinobu Mita <akinobu.mita@...il.com> To: LKML <linux-kernel@...r.kernel.org> Cc: Akinobu Mita <akinobu.mita@...il.com>, Nick Piggin <npiggin@...nel.dk>, Jens Axboe <axboe@...nel.dk>, Andrew Morton <akpm@...ux-foundation.org>, linux-fsdevel@...r.kernel.org Subject: Re: [PATCH] brd: detect zero writes for saving ram 2015-02-08 0:03 GMT+09:00 Akinobu Mita <akinobu.mita@...il.com>: > This introduces a module parameter to detect zero writes and not to > allocate memory. Read requests for unallocated (unwritten) region > end up by reading zero. So this can save zeroed memory consumption > with extra overhead for the detection. > > This feature is useful for testing filesystems and user programs to > huge files without huge real storage. So this change also extends > the upper limit on the size of the RAM disk. I have just noticed about zram and I'll check I can use it instead. -- 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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