zram: add writeback batch size device attr

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Introduce writeback_batch_size device attribute so that the maximum number
of in-flight writeback bio requests can be configured at run-time
per-device.  This essentially enables batched bio writeback.

Link: https://lkml.kernel.org/r/20251122074029.3948921-3-senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Reviewed-by: Brian Geffon <bgeffon@google.com>
Cc: Minchan Kim <minchan@google.com>
Cc: Richard Chang <richardycc@google.com>
Cc: Yuwen Chen <ywen.chen@foxmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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Sergey Senozhatsky 2025-11-22 16:40:25 +09:00 • committed by Andrew Morton

parent f405066a1f

commit e828cccb72

2 changed files with 41 additions and 6 deletions

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drivers/block/zram/zram_drv.c

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1

drivers/block/zram/zram_drv.h

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