On Thu, Dec 12, 2024 at 12:58:26PM +0900, Sergey Senozhatsky wrote: > Hi, > > We've got two reports [1] [2] (could be the same person) which > suggest that ext4 may change page content while the page is under > write(). The particular problem here the case when ext4 is on > the zram device. zram compresses every page written to it, so if > the page content can be modified concurrently with zram's compression > then we can't really use zram with ext4. This smells like ext4 doesn't respect BDI_CAP_STABLE_WRITES somewhere.
