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Date: Fri, 11 Apr 2014 23:05:30 +0200 From: Fabian Frederick <fabf@...net.be> To: Christoph Hellwig <hch@...radead.org> Cc: Viro <viro@...iv.linux.org.uk>, linux-kernel <linux-kernel@...r.kernel.org>, linux-fsdevel <linux-fsdevel@...r.kernel.org>, jack <jack@...e.cz>, akpm <akpm@...ux-foundation.org> Subject: Re: [PATCH 1/1] FS: Add generic data flush to fsync On Fri, 11 Apr 2014 00:45:22 -0700 Christoph Hellwig <hch@...radead.org> wrote: > On Fri, Apr 11, 2014 at 06:52:42AM +0200, Fabian Frederick wrote: > > Currently, there's no generic HW flush management support in kernel. > > Only 7 filesystems have their own way to manage the barrier flag. > > > > This patch adds MS_BARRIER in sb_flags and conditionnaly issues the flush > > in generic_file_fsync. > > Please don't add a binary mount option for something thast already is a > text option in many filesystems. We can actually enable/disable cache > flushes at the block device level, so I think this can be > unconditional. Ok, that would mean 'older' filesystems -without barrier flag- to call generic_file_fsync would result in a flush but ext4 without journal also calls it ; maybe with nobarrier and I'm not sure it's the only case. How can I deal with this problem ? -- 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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