dm pcache: fix cache info indexing

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commit ee76331783 upstream.

The on-media cache_info index used sizeof(struct) instead of the
4K metadata stride, so gc_percent updates from dmsetup message
were written between slots and lost after reboot. Use
PCACHE_CACHE_INFO_SIZE in get_cache_info_addr() and align
info_index with the slot returned by pcache_meta_find_latest().

Signed-off-by: Li Chen <chenl311@chinatelecom.cn>
Signed-off-by: Dongsheng Yang <dongsheng.yang@linux.dev>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reviewed-by: Zheng Gu <cengku@gmail.com>
Cc: stable@vger.kernel.org	# 6.18
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Li Chen 2025-12-05 05:46:19 +00:00 • committed by Greg Kroah-Hartman

parent c7d8c1018a

commit 87f7a7e2ed

1 changed files with 4 additions and 1 deletions

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drivers/md/dm-pcache/cache.c

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