vfs: add the RWF_HIPRI flag for preadv2/pwritev2

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This adds a flag that tells the file system that this is a high priority
request for which it's worth to poll the hardware.  The flag is purely
advisory and can be ignored if not supported.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Stephen Bates <stephen.bates@pmcs.com>
Tested-by: Stephen Bates <stephen.bates@pmcs.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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Christoph Hellwig 2016-03-03 16:04:01 +01:00 • committed by Al Viro

parent 4babf2c5ef

commit 97be7ebe53

3 changed files with 8 additions and 2 deletions

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include/uapi/linux/fs.h

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