On (24/10/28 15:10), Andrew Morton wrote: > Patch series "zram: IDLE flag handling fixes". > > zram can wrongly preserve ZRAM_IDLE flag on its entries which can result > in premature post-processing (writeback and recompression) of such > entries. > > > This patch (of 2): > > Recompression should clear ZRAM_IDLE flag on the entires it has accessed, > because otherwise some entries, specifically those for which recompression > has failed, become immediate candidate entries for another post-processing > (e.g. writeback). > > Consider the following case: > - recompression marks entries IDLE every 4 hours and attempts > to recompress them > - some entries are incompressible, so we keep them intact and > hence preserve IDLE flag > - writeback marks entries IDLE every 8 hours and writebacks > IDLE entries, however we have IDLE entries left from > recompression, so writeback prematurely writebacks those > entries. > > Link: https://lkml.kernel.org/r/20241028073529.1383980-1-senozhatsky@xxxxxxxxxxxx > Link: https://lkml.kernel.org/r/20241028073529.1383980-2-senozhatsky@xxxxxxxxxxxx > Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> > Reported-by: Shin Kawamura <kawasin@xxxxxxxxxx> > Cc: Minchan Kim <minchan@xxxxxxxxxx> > Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Andrew, can I please ask you to replace these patches with v2 series? v2 comes with styles and typos fixed. https://lore.kernel.org/linux-kernel/20241028153629.1479791-1-senozhatsky@xxxxxxxxxxxx
