kernel/linux.git/fs/dlm/memory.c, branch v6.6.132

fs: dlm: change dflags to use atomic bits

2023-03-06T21:49:07+00:00

Currently manipulating lkb_dflags assumes to held the rsb lock assigned to the lkb. This is held by dlm message processing after certain time to lookup the right rsb from the received lkb message id. For user space locks flags, which is currently the only use case for lkb_dflags, flags are also being set during dlm character device handling without holding the rsb lock. To minimize the risk that bit operations are getting corrupted we switch to atomic bit operations. This patch will also introduce helpers to snapshot atomic bit values in an non atomic way. There might be still issues with the flag handling e.g. running in case of manipulating bit ops and snapshot them at the same time, but this patch minimize them and will start to use atomic bit operations. Signed-off-by: Alexander Aring Signed-off-by: David Teigland

fs: dlm: store lkb distributed flags into own value

2023-03-06T21:49:07+00:00

This patch stores lkb distributed flags value in an separate value instead of sharing internal and distributed flags in lkb->lkb_flags value. This has the advantage to not mask/write back flag values in receive_flags() functionality. The dlm debug_fs does not provide the distributed flags anymore, those can be added in future. Signed-off-by: Alexander Aring Signed-off-by: David Teigland

fs: dlm: fix return value check in dlm_memory_init()

2023-01-05T21:37:51+00:00

It should check 'cb_cache', after calling kmem_cache_create("dlm_cb"). Fixes: 61bed0baa4db ("fs: dlm: use a non-static queue for callbacks") Signed-off-by: Yang Yingliang Signed-off-by: David Teigland

fs: dlm: allow different allocation context per _create_message

2022-11-08T18:59:41+00:00

This patch allows to give the use control about the allocation context based on a per message basis. Currently all messages forced to be created under GFP_NOFS context. Signed-off-by: Alexander Aring Signed-off-by: David Teigland

fs: dlm: use a non-static queue for callbacks

2022-11-08T18:59:41+00:00

This patch will introducde a queue implementation for callbacks by using the Linux lists. The current callback queue handling is implemented by a static limit of 6 entries, see DLM_CALLBACKS_SIZE. The sequence number inside the callback structure was used to see if the entries inside the static entry is valid or not. We don't need any sequence numbers anymore with a dynamic datastructure with grows and shrinks during runtime to offer such functionality. We assume that every callback will be delivered to the DLM user if once queued. Therefore the callback flag DLM_CB_SKIP was dropped and the check for skipping bast was moved before worker handling and not skip while the callback worker executes. This will reduce unnecessary queues of the callback worker. All last callback saves are pointers now and don't need to copied over. There is a reference counter for callback structures which will care about to free the callback structures at the right time if they are not referenced anymore. Signed-off-by: Alexander Aring Signed-off-by: David Teigland

fs: dlm: memory cache for lowcomms hotpath

2021-12-07T18:42:26+00:00

This patch introduces a kmem cache for dlm_msg handles which are used always if dlm sends a message out. Even if their are covered by midcomms layer or not. Signed-off-by: Alexander Aring Signed-off-by: David Teigland

fs: dlm: memory cache for writequeue_entry

2021-12-07T18:42:26+00:00

This patch introduces a kmem cache for writequeue entry. A writequeue entry get quite a lot allocated if dlm transmit messages. Signed-off-by: Alexander Aring Signed-off-by: David Teigland

fs: dlm: memory cache for midcomms hotpath

2021-12-07T18:42:26+00:00

This patch will introduce a kmem cache for allocating message handles which are needed for midcomms layer to take track of lowcomms messages. Signed-off-by: Alexander Aring Signed-off-by: David Teigland

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 193

2019-05-30T18:29:21+00:00

Based on 1 normalized pattern(s): this copyrighted material is made available to anyone wishing to use modify copy or redistribute it subject to the terms and conditions of the gnu general public license v 2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 45 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Richard Fontana Reviewed-by: Allison Randal Reviewed-by: Steve Winslow Reviewed-by: Alexios Zavras Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528170027.342746075@linutronix.de Signed-off-by: Greg Kroah-Hartman

dlm: NULL check before kmem_cache_destroy is not needed

2018-11-28T14:45:55+00:00

kmem_cache_destroy(NULL) is safe, so removes NULL check before freeing the mem. This patch also fix ifnullfree.cocci warnings. Signed-off-by: Wen Yang Signed-off-by: David Teigland