Searched hist:"9 f233ffe02e5cef611100cd8c5bcf4de26ca7bef" (Results 1 – 3 of 3) sorted by relevance
| /openbmc/linux/drivers/md/bcache/ |
| H A D | bcache.h | diff 9f233ffe02e5cef611100cd8c5bcf4de26ca7bef Tue Feb 09 23:07:25 CST 2021 Kai Krakow <kai@kaishome.de> Revert "bcache: Kill btree_io_wq"
This reverts commit 56b30770b27d54d68ad51eccc6d888282b568cee.
With the btree using the `system_wq`, I seem to see a lot more desktop
latency than I should.
After some more investigation, it looks like the original assumption
of 56b3077 no longer is true, and bcache has a very high potential of
congesting the `system_wq`. In turn, this introduces laggy desktop
performance, IO stalls (at least with btrfs), and input events may be
delayed.
So let's revert this. It's important to note that the semantics of
using `system_wq` previously mean that `btree_io_wq` should be created
before and destroyed after other bcache wqs to keep the same
assumptions.
Cc: Coly Li <colyli@suse.de>
Cc: stable@vger.kernel.org # 5.4+
Signed-off-by: Kai Krakow <kai@kaishome.de>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
|
| H A D | btree.c | diff 9f233ffe02e5cef611100cd8c5bcf4de26ca7bef Tue Feb 09 23:07:25 CST 2021 Kai Krakow <kai@kaishome.de> Revert "bcache: Kill btree_io_wq"
This reverts commit 56b30770b27d54d68ad51eccc6d888282b568cee.
With the btree using the `system_wq`, I seem to see a lot more desktop
latency than I should.
After some more investigation, it looks like the original assumption
of 56b3077 no longer is true, and bcache has a very high potential of
congesting the `system_wq`. In turn, this introduces laggy desktop
performance, IO stalls (at least with btrfs), and input events may be
delayed.
So let's revert this. It's important to note that the semantics of
using `system_wq` previously mean that `btree_io_wq` should be created
before and destroyed after other bcache wqs to keep the same
assumptions.
Cc: Coly Li <colyli@suse.de>
Cc: stable@vger.kernel.org # 5.4+
Signed-off-by: Kai Krakow <kai@kaishome.de>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
|
| H A D | super.c | diff 9f233ffe02e5cef611100cd8c5bcf4de26ca7bef Tue Feb 09 23:07:25 CST 2021 Kai Krakow <kai@kaishome.de> Revert "bcache: Kill btree_io_wq"
This reverts commit 56b30770b27d54d68ad51eccc6d888282b568cee.
With the btree using the `system_wq`, I seem to see a lot more desktop
latency than I should.
After some more investigation, it looks like the original assumption
of 56b3077 no longer is true, and bcache has a very high potential of
congesting the `system_wq`. In turn, this introduces laggy desktop
performance, IO stalls (at least with btrfs), and input events may be
delayed.
So let's revert this. It's important to note that the semantics of
using `system_wq` previously mean that `btree_io_wq` should be created
before and destroyed after other bcache wqs to keep the same
assumptions.
Cc: Coly Li <colyli@suse.de>
Cc: stable@vger.kernel.org # 5.4+
Signed-off-by: Kai Krakow <kai@kaishome.de>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
|