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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: /fmFtiH8JOeDQFlRIM3gHfHZvYOookAKz70V+ZbdbvfAJBtInIAwBWdUeLfKbrbyNd3ukZYA68CKqcTN1QaJTRD4JHCgWqog25Pvt9Qw+OXz5WX/mDmK62Pm5L88nxKUAAAeine9i/hDTiJJW8dh4Gspw+IqZsSumW837jpQRdvYWKcxNPg9ShtqSkJzMoEreIfEFE+VJNIZWTQKQWKKZ/SqctJdcJjhO/MHQNLGw6UR0PVd5+Ncgq2J9wVgYrBWFMW0Njy2BEaMD30VTpyUoCFirNAeqQd45SHMvnK8FAo/Wug4MKLJDIJHRa59eOfJtgPD0zbXKY1l6wd8eP20yDyTeb7QfUc7P6JY4jvJEsB0CbpeBxS94wINbhQyG44vPrCTJ5Uifhbc584xn0zdmrvVi9u9QChpwGL8MmlusgYJpFsY/P/j8gfiUcd/0Tth X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Oct 2026 10:55:35.7682 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9528b3d9-29ba-4d37-d2cc-08df367453c2 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: MAD0EPF000008BF.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR08MB11922 Hi Ashok, On 10/24/26 23:50, Ashok Raj wrote: > Hi Pierre, > > > On Mon, Oct 19, 2026 at 10:38:44PM +0200, Pierre Gondois wrote: >> Add dedicated GHES and EDAC callbacks for Memory Error Section 2 >> records. Use a separate GHES notifier chain so existing consumers >> continue to receive legacy memory error sections. >> >> Signed-off-by: Pierre Gondois >> --- >> drivers/acpi/apei/ghes.c | 49 +++++++++++++++- >> drivers/edac/ghes_edac.c | 118 +++++++++++++++++++++++++++++++++++++++ >> include/acpi/ghes.h | 2 + >> 3 files changed, 168 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c >> index fe10ab0e02f6..c7fb15543b56 100644 >> --- a/drivers/acpi/apei/ghes.c >> +++ b/drivers/acpi/apei/ghes.c >> @@ -101,6 +101,7 @@ >> #endif >> > [snip] > >> @@ -952,6 +977,16 @@ static void ghes_do_proc(struct ghes *ghes, >> >> arch_apei_report_mem_error(sev, mem_err); >> queued = ghes_handle_memory_failure(gdata, sev, sync); > One issue here. > >> + } else if (guid_equal(sec_type, &CPER_SEC_PLATFORM_MEM2)) { >> + struct cper_sec_mem_err2 *mem_err = acpi_hest_get_payload(gdata); >> + >> + if (gdata->error_data_length < sizeof(*mem_err)) { >> + pr_warn(FW_WARN "Memory Error Section 2 length is too small\n"); >> + continue; >> + } >> + >> + atomic_notifier_call_chain(&ghes_report_mem2_chain, sev, mem_err); >> + queued = ghes_handle_memory_failure2(gdata, sev, sync); > could this accumulate queued with |= ? > > queued describes whether any section in this GHES status record queued > memory-failure work. The synchronous GHES path sends SIGBUS after the > section loop when `!queued`. > > For example, a synchronous record can contain an eligible legacy memory > section followed by a Memory Error Section 2 record without a valid > physical address. The legacy section queues memory-failure work and sets > queued, but the Section 2 handler returns false and this assignment clears > the previous result. ghes_do_proc() then reaches the `sync && !queued` > path and sends SIGBUS despite having queued recovery work for the earlier > section. > > This series appears to be based before the queued accumulation fix [1]. > Could the new Memory Error Section 2 branch follow the same pattern? > >> + queued = ghes_handle_memory_failure2(gdata, sev, sync); > should be: > > queued |= ghes_handle_memory_failure2(gdata, sev, sync); > > Otherwise, an earlier section can queue memory-failure work, while a later > Section 2 record for which no work is queued clears `queued`. For a > synchronous GHES record, ghes_do_proc() will then reach `sync && !queued` > and send SIGBUS despite recovery work having been queued for the earlier > section. > > Thoughts? > > [1] https://lore.kernel.org/r/20260925-ghes-queued-accumulate-v1-1-df50553957d4@debian.org/ > Ok sure, I will rebase the serie and do similar changes