Disable writeback cache for rapiddisk RAM drives

[pkoutoupis]

diff --git a/module/rapiddisk.c b/module/rapiddisk.c
index 735aeda..d570d00 100644
--- a/module/rapiddisk.c
+++ b/module/rapiddisk.c
@@ -819,9 +819,9 @@ static int attach_device(unsigned long num, unsigned long long size)
 #endif
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4,7,0)
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(5,14,0)
-       blk_queue_write_cache(disk->queue, true, false);
+       blk_queue_write_cache(disk->queue, false, false);
 #else
-       blk_queue_write_cache(rdsk->rdsk_queue, true, false);
+       blk_queue_write_cache(rdsk->rdsk_queue, false, false);
 #endif
 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)
        blk_queue_flush(rdsk->rdsk_queue, REQ_FLUSH);

Avoid double writing data in memory.

[pkoutoupis]

This was merged in https://github.com/pkoutoupis/rapiddisk/pull/151

[Augusto7743]

@pkoutoupis

All good with you ?

That PR disable creating wb caches or only remove code doing double writing data ?

[pkoutoupis]

@Augusto7743 Hello. All is good. You? The second scenario. It is just a one line change in the RAM drive module that does not affect the dm_writecache support. So, no worries there.

[Augusto7743]

current master version working without issues in kernel 6.2.6. Have an nice week for you and the users too.