From: Laurent Dufour ldufour@linux.ibm.com
stable inclusion from stable-v5.10.209 commit f2ec41874b650028e7bc11ef44f18a5b4065843f category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I94CNS CVE: CVE-2023-52451
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 20e9de85edae3a5866f29b6cce87c9ec66d62a1b ]
When attempting to remove by index a set of LMBs a lot of messages are displayed on the console, even when everything goes fine:
pseries-hotplug-mem: Attempting to hot-remove LMB, drc index 8000002d Offlined Pages 4096 pseries-hotplug-mem: Memory at 2d0000000 was hot-removed
The 2 messages prefixed by "pseries-hotplug-mem" are not really helpful for the end user, they should be debug outputs.
In case of error, because some of the LMB's pages couldn't be offlined, the following is displayed on the console:
pseries-hotplug-mem: Attempting to hot-remove LMB, drc index 8000003e pseries-hotplug-mem: Failed to hot-remove memory at 3e0000000 dlpar: Could not handle DLPAR request "memory remove index 0x8000003e"
Again, the 2 messages prefixed by "pseries-hotplug-mem" are useless, and the generic DLPAR prefixed message should be enough.
These 2 first changes are mainly triggered by the changes introduced in drmgr: https://groups.google.com/g/powerpc-utils-devel/c/Y6ef4NB3EzM/m/9cu5JHRxAQAJ
Also, when adding a bunch of LMBs, a message is displayed in the console per LMB like these ones: pseries-hotplug-mem: Memory at 7e0000000 (drc index 8000007e) was hot-added pseries-hotplug-mem: Memory at 7f0000000 (drc index 8000007f) was hot-added pseries-hotplug-mem: Memory at 800000000 (drc index 80000080) was hot-added pseries-hotplug-mem: Memory at 810000000 (drc index 80000081) was hot-added
When adding 1TB of memory and LMB size is 256MB, this leads to 4096 messages to be displayed on the console. These messages are not really helpful for the end user, so moving them to the DEBUG level.
Signed-off-by: Laurent Dufour ldufour@linux.ibm.com [mpe: Tweak change log wording] Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://lore.kernel.org/r/20201211145954.90143-1-ldufour@linux.ibm.com Stable-dep-of: bd68ffce69f6 ("powerpc/pseries/memhp: Fix access beyond end of drmem array") Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Lin Yujun linyujun809@huawei.com --- arch/powerpc/platforms/pseries/hotplug-memory.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c index a5f968b5fa3a..0e602c3b01ea 100644 --- a/arch/powerpc/platforms/pseries/hotplug-memory.c +++ b/arch/powerpc/platforms/pseries/hotplug-memory.c @@ -481,7 +481,7 @@ static int dlpar_memory_remove_by_index(u32 drc_index) int lmb_found; int rc;
- pr_info("Attempting to hot-remove LMB, drc index %x\n", drc_index); + pr_debug("Attempting to hot-remove LMB, drc index %x\n", drc_index);
lmb_found = 0; for_each_drmem_lmb(lmb) { @@ -499,10 +499,10 @@ static int dlpar_memory_remove_by_index(u32 drc_index) rc = -EINVAL;
if (rc) - pr_info("Failed to hot-remove memory at %llx\n", - lmb->base_addr); + pr_debug("Failed to hot-remove memory at %llx\n", + lmb->base_addr); else - pr_info("Memory at %llx was hot-removed\n", lmb->base_addr); + pr_debug("Memory at %llx was hot-removed\n", lmb->base_addr);
return rc; } @@ -719,8 +719,8 @@ static int dlpar_memory_add_by_count(u32 lmbs_to_add) if (!drmem_lmb_reserved(lmb)) continue;
- pr_info("Memory at %llx (drc index %x) was hot-added\n", - lmb->base_addr, lmb->drc_index); + pr_debug("Memory at %llx (drc index %x) was hot-added\n", + lmb->base_addr, lmb->drc_index); drmem_remove_lmb_reservation(lmb); } rc = 0;