Messages in this thread | | | Date | Thu, 05 Aug 2010 05:20:12 +0300 | From | Avi Kivity <> | Subject | Re: [RFC] ext4: Don't send extra barrier during fsync if there are no dirty pages. |
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On 08/05/2010 02:32 AM, Ted Ts'o wrote: > On Tue, Aug 03, 2010 at 04:24:49PM +0300, Avi Kivity wrote: >> On 06/30/2010 03:48 PM, tytso@mit.edu wrote: >>> I wonder if it's worthwhile to think about a new system call which >>> allows users to provide an array of fd's which are collectively should >>> be fsync'ed out at the same time. Otherwise, we end up issuing >>> multiple barrier operations in cases where the application needs to >>> do: >>> >>> fsync(control_fd); >>> fsync(data_fd); >>> >> The system call exists, it's called io_submit(). > Um, not the same thing at all.
Why not? To be clear, I'm talking about an io_submit() with multiple IO_CMD_FSYNC requests, with a kernel implementation that is able to batch these requests.
-- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.
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