LKML News v5.5-rc2


As the buffered IO uses the page cache, an intensive buffered IO workload using very huge file can cause memory pressure by inflating the page cache. Changing the workload to do direct IO can solve this problem, but the modification is not so simple. Jens Axboe thus implemented RWF_UNCACHED flag, which skips use of the page cache if the given IO target is not in the page cache already. Jonathan Corbet has also introduced this patchset in LWN (

Linux 5.5.-rc2

The first release right after the close of the merge window, namely rc2, is usually calm because it is too early to find bugs. This release was also did. It’s calm and normal. Torvalds asks us for test.

SeongJae Park
Kernel Development Engineer

SeongJae Park is a programmer who loves to analyze and develop systems.