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| author |   Fan Yong <fan.yong@intel.com> | 2017-07-26 11:22:28 -0400 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-30 08:08:31 -0700 |
| commit | 7da5e8900f04fc651af855170de144e9cd73dd65 (patch) | |
| tree | 0f1d35847c741a4d4adea6c727e3fa5e1b59599b /drivers/staging/lustre/lustre/ptlrpc/wiretest.c | |
| parent | staging: lustre: lustre: fix all less than 0 comparison for unsigned values (diff) | |
| download | linux-dev-7da5e8900f04fc651af855170de144e9cd73dd65.tar.xz linux-dev-7da5e8900f04fc651af855170de144e9cd73dd65.zip | |
staging: lustre: linkea: linkEA size limitation
Under DNE mode, if we do not restrict the linkEA size, and if there
are too many cross-MDTs hard links to the same object, then it will
cause the llog overflow. On the other hand, too many linkEA entries
in the linkEA will serious affect the linkEA performance because we
only support to locate linkEA entry consecutively.
So we need to restrict the linkEA size. Currently, it is 4096 bytes,
that is independent from the backend. If too many hard links caused
the linkEA overflowed, we will add overflow timestamp in the linkEA
header.
Signed-off-by: Fan Yong <fan.yong@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8569
Reviewed-on: https://review.whamcloud.com/23500
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: wangdi <di.wang@intel.com>
Reviewed-by: Lai Siyao <lai.siyao@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/lustre/lustre/ptlrpc/wiretest.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/ptlrpc/wiretest.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/staging/lustre/lustre/ptlrpc/wiretest.c b/drivers/staging/lustre/lustre/ptlrpc/wiretest.c index 367f7e24e3da..311c52624430 100644 --- a/drivers/staging/lustre/lustre/ptlrpc/wiretest.c +++ b/drivers/staging/lustre/lustre/ptlrpc/wiretest.c @@ -3820,14 +3820,14 @@ void lustre_assert_wire_constants(void) (long long)(int)offsetof(struct link_ea_header, leh_len)); LASSERTF((int)sizeof(((struct link_ea_header *)0)->leh_len) == 8, "found %lld\n", (long long)(int)sizeof(((struct link_ea_header *)0)->leh_len)); - LASSERTF((int)offsetof(struct link_ea_header, padding1) == 16, "found %lld\n", - (long long)(int)offsetof(struct link_ea_header, padding1)); - LASSERTF((int)sizeof(((struct link_ea_header *)0)->padding1) == 4, "found %lld\n", - (long long)(int)sizeof(((struct link_ea_header *)0)->padding1)); - LASSERTF((int)offsetof(struct link_ea_header, padding2) == 20, "found %lld\n", - (long long)(int)offsetof(struct link_ea_header, padding2)); - LASSERTF((int)sizeof(((struct link_ea_header *)0)->padding2) == 4, "found %lld\n", - (long long)(int)sizeof(((struct link_ea_header *)0)->padding2)); + LASSERTF((int)offsetof(struct link_ea_header, leh_overflow_time) == 16, "found %lld\n", + (long long)(int)offsetof(struct link_ea_header, leh_overflow_time)); + LASSERTF((int)sizeof(((struct link_ea_header *)0)->leh_overflow_time) == 4, "found %lld\n", + (long long)(int)sizeof(((struct link_ea_header *)0)->leh_overflow_time)); + LASSERTF((int)offsetof(struct link_ea_header, leh_padding) == 20, "found %lld\n", + (long long)(int)offsetof(struct link_ea_header, leh_padding)); + LASSERTF((int)sizeof(((struct link_ea_header *)0)->leh_padding) == 4, "found %lld\n", + (long long)(int)sizeof(((struct link_ea_header *)0)->leh_padding)); BUILD_BUG_ON(LINK_EA_MAGIC != 0x11EAF1DFUL); /* Checks for struct link_ea_entry */ |