Commit cb0551ad authored by Sergey Senozhatsky's avatar Sergey Senozhatsky Committed by Andrew Morton
Browse files

zram: further limit recompression threshold 

Recompression threshold should be below huge-size-class watermark.  Any
object larger than huge-size-class is a "huge object" and occupies a
whole physical page on the zsmalloc side, in other words it's
incompressible, as far as zsmalloc is concerned.

Link: https://lkml.kernel.org/r/20230614141338.3480029-1-senozhatsky@chromium.org


Signed-off-by: default avatarSergey Senozhatsky <senozhatsky@chromium.org>
Suggested-by: default avatarBrian Geffon <bgeffon@google.com>
Acked-by: default avatarBrian Geffon <bgeffon@google.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 418fd29d

drivers/block/zram/zram_drv.c

+1 −1
Original line number Diff line number Diff line
@@ -1753,7 +1753,7 @@ static ssize_t recompress_store(struct device *dev, 
		}

	}



	if (threshold >= PAGE_SIZE)

	if (threshold >= huge_class_size)

		return -EINVAL;



	down_read(&zram->init_lock);