Re: [PATCH v2 5/9] block/write-threshold: don't use aio context lock

On 04.05.21 10:25, Vladimir Sementsov-Ogievskiy wrote: Instead of relying on aio context lock, let's make use of atomic operations. The tricky place is bdrv_write_threshold_check_write(): we want atomically unset bs->write_threshold_offset iff offset + bytes > bs->write_threshold_offset We

[PATCH v2 5/9] block/write-threshold: don't use aio context lock

Instead of relying on aio context lock, let's make use of atomic operations. The tricky place is bdrv_write_threshold_check_write(): we want atomically unset bs->write_threshold_offset iff offset + bytes > bs->write_threshold_offset We don't have such atomic operation, so let's go in a loop: