forked from luck/tmp_suning_uos_patched
b049453221
This commit does two things. First, if there are any homeless
lingering requests, we now request a new osdmap even if the osdmap that
is being processed brought no changes, i.e. if a given lingering
request turned homeless in one of the previous epochs and remained
homeless in the current epoch. Not doing so leaves us with a stale
osdmap and as a result we may miss our window for reestablishing the
watch and lose notifies.
MON=1 OSD=1:
# cat linger-needmap.sh
#!/bin/bash
rbd create --size 1 test
DEV=$(rbd map test)
ceph osd out 0
rbd map dne/dne # obtain a new osdmap as a side effect (!)
sleep 1
ceph osd in 0
rbd resize --size 2 test
# rbd info test | grep size -> 2M
# blockdev --getsize $DEV -> 1M
N.B.: Not obtaining a new osdmap in between "osd out" and "osd in"
above is enough to make it miss that resize notify, but that is a
bug^Wlimitation of ceph watch/notify v1.
Second, homeless lingering requests are now kicked just like those
lingering requests whose mapping has changed. This is mainly to
recognize that a homeless lingering request makes no sense and to
preserve the invariant that a registered lingering request is not
sitting on any of r_req_lru_item lists. This spares us a WARN_ON,
which commit
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.. | ||
crush | ||
armor.c | ||
auth_none.c | ||
auth_none.h | ||
auth_x_protocol.h | ||
auth_x.c | ||
auth_x.h | ||
auth.c | ||
buffer.c | ||
ceph_common.c | ||
ceph_fs.c | ||
ceph_hash.c | ||
ceph_strings.c | ||
crypto.c | ||
crypto.h | ||
debugfs.c | ||
Kconfig | ||
Makefile | ||
messenger.c | ||
mon_client.c | ||
msgpool.c | ||
osd_client.c | ||
osdmap.c | ||
pagelist.c | ||
pagevec.c | ||
snapshot.c |