Christoph Hellwig <hch@xxxxxx> writes: > On Fri, Feb 26, 2016 at 04:18:55PM -0500, Jeff Moyer wrote: >> Christoph Hellwig <hch@xxxxxx> writes: >> >> > This series allows to selectively enable/disable polling for completions >> > in the block layer on a per-I/O basis. For this it resurrects the >> > preadv2/pwritev2 syscalls that Milosz prepared a while ago (and which >> > are much simpler now due to VFS changes that happened in the meantime). >> > That approach also had a man page update prepared, which I will resubmit >> > with the current flags once this series makes it in. >> >> It would be helpful for reviewers if you submitted the man page at the >> same time, in my opinion. > > Ok. > >> Do you have any plans on adding polling support to the buffered path? > > How would that even make sense? I admit I haven't looked into the implementation details, but I was thinking about O_SYNC writes or reads that missed the cache. Thinking about this some more, it occurs to me that a file opened with O_SYNC will still incur context switching. Do you think we should add that to the NOTES section of the man page? Cheers, Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
