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| author | John Allen <jallen@linux.vnet.ibm.com> | 2017-08-23 12:18:43 -0500 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-08-31 20:02:23 +1000 |
| commit | afb5519fdb346201728040cab4e08ce53e7ff4fd (patch) | |
| tree | c88751b7b0f4842af069b7326cd5cd99fbff6ff9 /arch/powerpc | |
| parent | 7def9a2418430a8af2a56023769ccdcdea7cd7e1 (diff) | |
| download | linux-afb5519fdb346201728040cab4e08ce53e7ff4fd.tar.bz2 | |
powerpc/pseries: Don't attempt to acquire drc during memory hot add for assigned lmbs
Check if an LMB is assigned before attempting to call dlpar_acquire_drc
in order to avoid any unnecessary rtas calls. This substantially
reduces the running time of memory hot add on lpars with large amounts
of memory.
[mpe: We need to explicitly set rc to 0 in the success case, otherwise
the compiler might think we use rc without initialising it.]
Fixes: c21f515c7436 ("powerpc/pseries: Make the acquire/release of the drc for memory a seperate step")
Cc: stable@vger.kernel.org # v4.11+
Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>
Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/pseries/hotplug-memory.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c index 9e3afd238d34..1d48ab424bd9 100644 --- a/arch/powerpc/platforms/pseries/hotplug-memory.c +++ b/arch/powerpc/platforms/pseries/hotplug-memory.c @@ -828,6 +828,9 @@ static int dlpar_memory_add_by_count(u32 lmbs_to_add, struct property *prop) return -EINVAL; for (i = 0; i < num_lmbs && lmbs_to_add != lmbs_added; i++) { + if (lmbs[i].flags & DRCONF_MEM_ASSIGNED) + continue; + rc = dlpar_acquire_drc(lmbs[i].drc_index); if (rc) continue; @@ -870,6 +873,7 @@ static int dlpar_memory_add_by_count(u32 lmbs_to_add, struct property *prop) lmbs[i].base_addr, lmbs[i].drc_index); lmbs[i].reserved = 0; } + rc = 0; } return rc; |