The quilt patch titled Subject: zram: cond_resched() in writeback loop has been removed from the -mm tree. Its filename was zram-cond_resched-in-writeback-loop.patch This patch was dropped because it was withdrawn ------------------------------------------------------ From: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> Subject: zram: cond_resched() in writeback loop Date: Tue, 10 Dec 2024 19:53:55 +0900 Patch series "zram: split page type read/write handling". This is a subset of [1] series which contains only fixes and improvements (no new features, as ZRAM_HUGE split is still under consideration). The motivation for factoring out is that zram_write_page() gets more and more complex all the time, because it tries to handle too many scenarios: ZRAM_SAME store, ZRAM_HUGE store, compress page store with zs_malloc allocation slowpath and conditional recompression, etc. Factor those out and make things easier to handle. Addition of cond_resched() is simply a fix, I can trigger watchdog from zram writeback(). And early slot free is just a reasonable thing to do. [1] https://lore.kernel.org/linux-kernel/20241119072057.3440039-1-senozhatsky@xxxxxxxxxxxx This patch (of 6): Writeback loop can run for quite a while (depending on wb device performance, compression algorithm and the number of entries we writeback), so we need to do cond_resched() there, similarly to what we do in recompress loop. Link: https://lkml.kernel.org/r/20241210105420.1888790-1-senozhatsky@xxxxxxxxxxxx Link: https://lkml.kernel.org/r/20241210105420.1888790-2-senozhatsky@xxxxxxxxxxxx Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> Cc: Minchan Kim <minchan@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/block/zram/zram_drv.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/block/zram/zram_drv.c~zram-cond_resched-in-writeback-loop +++ a/drivers/block/zram/zram_drv.c @@ -889,6 +889,8 @@ static ssize_t writeback_store(struct de next: zram_slot_unlock(zram, index); release_pp_slot(zram, pps); + + cond_resched(); } if (blk_idx) _ Patches currently in -mm which might be from senozhatsky@xxxxxxxxxxxx are zram-panic-when-use-ext4-over-zram-fix.patch zram-free-slot-memory-early-during-write.patch zram-remove-entry-element-member.patch zram-factor-out-zram_same-write.patch zram-factor-out-zram_huge-write.patch zram-factor-out-different-page-types-read.patch