4.19-stable patches

added patches:
	mm-vmstat-drop-zone-lock-in-proc-pagetypeinfo.patch
	usb-dwc3-gadget-enable-suspend-events.patch

diff --git a/queue-4.19/mm-vmstat-drop-zone-lock-in-proc-pagetypeinfo.patch b/queue-4.19/mm-vmstat-drop-zone-lock-in-proc-pagetypeinfo.patch
new file mode 100644 (file)
index 0000000..fbc5971
--- /dev/null
+++ b/queue-4.19/mm-vmstat-drop-zone-lock-in-proc-pagetypeinfo.patch
@@ -0,0 +1,49 @@
+From foo@baz Thu May 27 11:14:38 AM CEST 2021
+From: Stephen Brennan <stephen.s.brennan@oracle.com>
+Date: Wed, 26 May 2021 10:46:13 -0700
+Subject: mm, vmstat: drop zone->lock in /proc/pagetypeinfo
+To: stable@vger.kernel.org
+Cc: Stephen Brennan <stephen.s.brennan@oracle.com>, Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Christoph Lameter <clameter@sgi.com>, Mel Gorman <mel@csn.ul.ie>, Andy Whitcroft <apw@shadowen.org>, Aruna Ramakrishna <aruna.ramakrishna@oracle.com>, Khalid Aziz <khalid.aziz@oracle.com>
+Message-ID: <20210526174613.339990-1-stephen.s.brennan@oracle.com>
+
+From: Stephen Brennan <stephen.s.brennan@oracle.com>
+
+Commit 93b3a674485f6a4b8ffff85d1682d5e8b7c51560 upstream
+
+Commit 93b3a674485f ("mm,vmstat: reduce zone->lock holding time by
+/proc/pagetypeinfo") upstream caps the number of iterations over each
+free_list at 100,000, and also drops the zone->lock in between each
+migrate type. Capping the iteration count alters the file contents in
+some cases, which means this approach may not be suitable for stable
+backports.
+
+However, dropping zone->lock in between migrate types (and, as a result,
+page orders) will not change the /proc/pagetypeinfo file contents. It
+can significantly reduce the length of time spent with IRQs disabled,
+which can prevent missed interrupts or soft lockups which we have
+observed on systems with particularly large memory.
+
+Thus, this commit is a modified version of the upstream one which only
+drops the lock in between migrate types.
+
+Fixes: 467c996c1e19 ("Print out statistics in relation to fragmentation avoidance to /proc/pagetypeinfo")
+Signed-off-by: Stephen Brennan <stephen.s.brennan@oracle.com>
+Reviewed-by: Aruna Ramakrishna <aruna.ramakrishna@oracle.com>
+Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ mm/vmstat.c |    3 +++
+ 1 file changed, 3 insertions(+)
+
+--- a/mm/vmstat.c
++++ b/mm/vmstat.c
+@@ -1384,6 +1384,9 @@ static void pagetypeinfo_showfree_print(
+                       list_for_each(curr, &area->free_list[mtype])
+                               freecount++;
+                       seq_printf(m, "%6lu ", freecount);
++                      spin_unlock_irq(&zone->lock);
++                      cond_resched();
++                      spin_lock_irq(&zone->lock);
+               }
+               seq_putc(m, '\n');
+       }

diff --git a/queue-4.19/series b/queue-4.19/series
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..ec021e62407bb4f50c569b07c64d37c484c50858 100644 (file)
--- a/queue-4.19/series
+++ b/queue-4.19/series
@@ -0,0 +1,2 @@
+mm-vmstat-drop-zone-lock-in-proc-pagetypeinfo.patch
+usb-dwc3-gadget-enable-suspend-events.patch

diff --git a/queue-4.19/usb-dwc3-gadget-enable-suspend-events.patch b/queue-4.19/usb-dwc3-gadget-enable-suspend-events.patch
new file mode 100644 (file)
index 0000000..a7fdefe
--- /dev/null
+++ b/queue-4.19/usb-dwc3-gadget-enable-suspend-events.patch
@@ -0,0 +1,43 @@
+From d1d90dd27254c44d087ad3f8b5b3e4fff0571f45 Mon Sep 17 00:00:00 2001
+From: Jack Pham <jackp@codeaurora.org>
+Date: Wed, 28 Apr 2021 02:01:10 -0700
+Subject: usb: dwc3: gadget: Enable suspend events
+
+From: Jack Pham <jackp@codeaurora.org>
+
+commit d1d90dd27254c44d087ad3f8b5b3e4fff0571f45 upstream.
+
+commit 72704f876f50 ("dwc3: gadget: Implement the suspend entry event
+handler") introduced (nearly 5 years ago!) an interrupt handler for
+U3/L1-L2 suspend events.  The problem is that these events aren't
+currently enabled in the DEVTEN register so the handler is never
+even invoked.  Fix this simply by enabling the corresponding bit
+in dwc3_gadget_enable_irq() using the same revision check as found
+in the handler.
+
+Fixes: 72704f876f50 ("dwc3: gadget: Implement the suspend entry event handler")
+Acked-by: Felipe Balbi <balbi@kernel.org>
+Signed-off-by: Jack Pham <jackp@codeaurora.org>
+Cc: stable <stable@vger.kernel.org>
+Link: https://lore.kernel.org/r/20210428090111.3370-1-jackp@codeaurora.org
+[jackp@codeaurora.org: backport to pre-5.7 by replacing
+ DWC3_IS_VER_PRIOR check with direct comparison of dwc->revision]
+Signed-off-by: Jack Pham <jackp@codeaurora.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/usb/dwc3/gadget.c |    4 ++++
+ 1 file changed, 4 insertions(+)
+
+--- a/drivers/usb/dwc3/gadget.c
++++ b/drivers/usb/dwc3/gadget.c
+@@ -1834,6 +1834,10 @@ static void dwc3_gadget_enable_irq(struc
+       if (dwc->revision < DWC3_REVISION_250A)
+               reg |= DWC3_DEVTEN_ULSTCNGEN;
+ 
++      /* On 2.30a and above this bit enables U3/L2-L1 Suspend Events */
++      if (dwc->revision >= DWC3_REVISION_230A)
++              reg |= DWC3_DEVTEN_EOPFEN;
++
+       dwc3_writel(dwc->regs, DWC3_DEVTEN, reg);
+ }
+