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authorPawel Baldysiak <pawel.baldysiak@intel.com>2017-08-16 17:13:45 +0200
committerShaohua Li <shli@fb.com>2017-08-28 07:45:48 -0700
commitddc088238cd6988bb4ac3776f403d7ff9d3c7a63 (patch)
tree7f3a97e6af0ae88416519fbfe9af9b9ed08324b0 /drivers/md/raid1.c
parent8a8e6f84ad10e7a10bde438b42926da0e9bc820f (diff)
downloadlinux-ddc088238cd6988bb4ac3776f403d7ff9d3c7a63.tar.bz2
md: Runtime support for multiple ppls
Increase PPL area to 1MB and use it as circular buffer to store PPL. The entry with highest generation number is the latest one. If PPL to be written is larger then space left in a buffer, rewind the buffer to the start (don't wrap it). Signed-off-by: Pawel Baldysiak <pawel.baldysiak@intel.com> Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com> Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid1.c')
-rw-r--r--drivers/md/raid1.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 79474f47eeef..1f5bd9475dc1 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -48,7 +48,8 @@
#define UNSUPPORTED_MDDEV_FLAGS \
((1L << MD_HAS_JOURNAL) | \
(1L << MD_JOURNAL_CLEAN) | \
- (1L << MD_HAS_PPL))
+ (1L << MD_HAS_PPL) | \
+ (1L << MD_HAS_MULTIPLE_PPLS))
/*
* Number of guaranteed r1bios in case of extreme VM load: