#10045 HIGH 1.5-sof: XO-1.5 Record audio/video are out of sync with each other
natetheis at gmail.com
Tue May 11 19:30:00 EDT 2010
Anyone want to test with a vanilla kernel? A plain Fedora userspace?
On Tue, May 11, 2010 at 4:24 PM, James Cameron <quozl at laptop.org> wrote:
> On Tue, May 11, 2010 at 07:14:53PM -0400, John Watlington wrote:
> > Writes in UNIX are typically asynchronous --- get the data into a memory
> > buffer and the program can continue along its merry way.
> > I strongly suspect that writes through the SD system are forced to wait
> > for the media to complete the write.
> My tests show that our kernel is doing this for USB and SD, on ext2,
> ext3, ext4, vfat, and raw access to the block device (open ... write ...
> write ... close). It isn't doing it for writes to tmpfs or null.
> James Cameron
> Devel mailing list
> Devel at lists.laptop.org
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