blackbird-op-linux/drivers/block/aoe/aoe.h, branch master

aoe: replace ->special use with private data in the request

2018-11-10T15:03:49+00:00

Makes the code a whole lot easier to read. Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

aoe: convert aoeblk to blk-mq

2018-10-14T18:47:52+00:00

Straight forward conversion - instead of rewriting the internal buffer retrieval logic, just replace the previous elevator peeking with an internal list of requests. Reviewed-by: "Ed L. Cashin" Signed-off-by: Jens Axboe

aoe: register default groups with device_add_disk()

2018-09-28T14:30:30+00:00

Register default sysfs groups during device_add_disk() to avoid a race condition with udev during startup. Signed-off-by: Hannes Reinecke Reviewed-by: Christoph Hellwig Acked-by: Ed L. Cachin Reviewed-by: Bart Van Assche Signed-off-by: Jens Axboe

aoe: use ktime_t instead of timeval

2018-01-17T15:41:07+00:00

'struct frame' uses two variables to store the sent timestamp - 'struct timeval' and jiffies. jiffies is used to avoid discrepancies caused by updates to system time. 'struct timeval' is deprecated because it uses 32-bit representation for seconds which will overflow in year 2038. This patch does the following: - Replace the use of 'struct timeval' and jiffies with ktime_t, which is the recommended type for timestamping - ktime_t provides both long range (like jiffies) and high resolution (like timeval). Using ktime_get (monotonic time) instead of wall-clock time prevents any discprepancies caused by updates to system time. [updates by Arnd below] The original patch from Tina never went anywhere as we discussed how to keep the impact on performance minimal. I've started over now but arrived at basically the same patch that she had originally, except for an slightly improved tsince_hr() function. I'm making it more robust against overflows, and also optimize explicitly for the common case in which a frame is less than 4.2 seconds old, using only a 32-bit division in that case. This should make the new version more efficient than the old code, since we replace the existing two 32-bit division in do_gettimeofday() plus one multiplication with a single single 32-bit division in tsince_hr() and drop the double bookkeeping. It's also more efficient than the ktime_get_us() API we discussed before, since that would also rely on multiple divisions. Link: https://lists.linaro.org/pipermail/y2038/2015-May/000276.html Signed-off-by: Tina Ruchandani Cc: Ed Cashin Signed-off-by: Arnd Bergmann Signed-off-by: Jens Axboe

aoe: Convert to immutable biovecs

2013-11-24T06:33:52+00:00

Now that we've got a mechanism for immutable biovecs - bi_iter.bi_bvec_done - we need to convert drivers to use primitives that respect it instead of using the bvec array directly. The aoe code no longer has to manually iterate over partial bvecs, so some struct members go away - other struct members are effectively renamed: buf->resid -> buf->iter.bi_size buf->sector -> buf->iter.bi_sector f->bcnt -> f->iter.bi_size f->lba -> f->iter.bi_sector Signed-off-by: Kent Overstreet Cc: Jens Axboe Cc: "Ed L. Cashin"

aoe: update internal version number to 85

2013-09-11T22:59:26+00:00

Signed-off-by: Ed Cashin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

aoe: add AoE-target files to debugfs

2013-09-11T22:59:23+00:00

Signed-off-by: Ed Cashin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

aoe: update internal version number to v83

2013-07-03T23:08:05+00:00

Signed-off-by: Ed Cashin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

aoe: update copyright date

2013-07-03T23:08:05+00:00

Signed-off-by: Ed Cashin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

aoe: perform I/O completions in parallel

2013-07-03T23:08:05+00:00

Some users have a large AoE target while others like to use many AoE targets at the same time. In the latter case, there is an opportunity to greatly improve aggregate throughput by allowing different threads to complete the I/O associated with each target. For 36 targets, 4 KiB read throughput roughly doubles, for example, with these changes in place. Signed-off-by: Ed Cashin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds