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Date: Tue, 15 Apr 2014 23:57:29 -0700 From: Brian Norris <computersforpeace@...il.com> To: Roman Pen <r.peniaev@...il.com> Cc: David Woodhouse <dwmw2@...radead.org>, linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [v2 PATCH 1/1] mtd: mtd_blkdevs: handle REQ_FLUSH request and do explicit flush of writeback buffer On Sat, Mar 08, 2014 at 09:59:14PM +0900, Roman Pen wrote: > From: Roman Peniaev <r.peniaev@...il.com> > > mtd_blkdevs is device with volatile cache (writeback buffer), so it should support > REQ_FLUSH to do explicit flush. > > Without this patch 'sync' does not guarantee that writeback buffer will be flushed > on disk in case of power off, e.g.: > > $ cp some_file /mnt > $ sync > > ### POWER OFF > > In case of this sequence writeback buffer will not be flushed on disk. > > This patch fixes this behaviour and explicitly reports to block layer that flush > requests are being supported. > > Signed-off-by: Roman Peniaev <r.peniaev@...il.com> > CC: David Woodhouse <dwmw2@...radead.org> > CC: Brian Norris <computersforpeace@...il.com> > CC: linux-mtd@...ts.infradead.org > CC: linux-kernel@...r.kernel.org Pushed to l2-mtd.git. Thanks! Brian -- 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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