From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/fs/xfs/kmem.c | 93 +++++++++++++++++++++-------------------------
1 files changed, 42 insertions(+), 51 deletions(-)
diff --git a/kernel/fs/xfs/kmem.c b/kernel/fs/xfs/kmem.c
index fdd9d6e..e986b95 100644
--- a/kernel/fs/xfs/kmem.c
+++ b/kernel/fs/xfs/kmem.c
@@ -3,15 +3,10 @@
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
-#include <linux/mm.h>
-#include <linux/sched/mm.h>
-#include <linux/highmem.h>
-#include <linux/slab.h>
-#include <linux/swap.h>
-#include <linux/blkdev.h>
+#include "xfs.h"
#include <linux/backing-dev.h>
-#include "kmem.h"
#include "xfs_message.h"
+#include "xfs_trace.h"
void *
kmem_alloc(size_t size, xfs_km_flags_t flags)
@@ -20,9 +15,11 @@
gfp_t lflags = kmem_flags_convert(flags);
void *ptr;
+ trace_kmem_alloc(size, flags, _RET_IP_);
+
do {
ptr = kmalloc(size, lflags);
- if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
+ if (ptr || (flags & KM_MAYFAIL))
return ptr;
if (!(++retries % 100))
xfs_err(NULL,
@@ -33,29 +30,25 @@
} while (1);
}
-void *
-kmem_alloc_large(size_t size, xfs_km_flags_t flags)
+
+/*
+ * __vmalloc() will allocate data pages and auxiliary structures (e.g.
+ * pagetables) with GFP_KERNEL, yet we may be under GFP_NOFS context here. Hence
+ * we need to tell memory reclaim that we are in such a context via
+ * PF_MEMALLOC_NOFS to prevent memory reclaim re-entering the filesystem here
+ * and potentially deadlocking.
+ */
+static void *
+__kmem_vmalloc(size_t size, xfs_km_flags_t flags)
{
unsigned nofs_flag = 0;
void *ptr;
- gfp_t lflags;
+ gfp_t lflags = kmem_flags_convert(flags);
- ptr = kmem_alloc(size, flags | KM_MAYFAIL);
- if (ptr)
- return ptr;
-
- /*
- * __vmalloc() will allocate data pages and auxillary structures (e.g.
- * pagetables) with GFP_KERNEL, yet we may be under GFP_NOFS context
- * here. Hence we need to tell memory reclaim that we are in such a
- * context via PF_MEMALLOC_NOFS to prevent memory reclaim re-entering
- * the filesystem here and potentially deadlocking.
- */
if (flags & KM_NOFS)
nofs_flag = memalloc_nofs_save();
- lflags = kmem_flags_convert(flags);
- ptr = __vmalloc(size, lflags, PAGE_KERNEL);
+ ptr = __vmalloc(size, lflags);
if (flags & KM_NOFS)
memalloc_nofs_restore(nofs_flag);
@@ -63,42 +56,40 @@
return ptr;
}
+/*
+ * Same as kmem_alloc_large, except we guarantee the buffer returned is aligned
+ * to the @align_mask. We only guarantee alignment up to page size, we'll clamp
+ * alignment at page size if it is larger. vmalloc always returns a PAGE_SIZE
+ * aligned region.
+ */
void *
-kmem_realloc(const void *old, size_t newsize, xfs_km_flags_t flags)
+kmem_alloc_io(size_t size, int align_mask, xfs_km_flags_t flags)
{
- int retries = 0;
- gfp_t lflags = kmem_flags_convert(flags);
void *ptr;
- do {
- ptr = krealloc(old, newsize, lflags);
- if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
+ trace_kmem_alloc_io(size, flags, _RET_IP_);
+
+ if (WARN_ON_ONCE(align_mask >= PAGE_SIZE))
+ align_mask = PAGE_SIZE - 1;
+
+ ptr = kmem_alloc(size, flags | KM_MAYFAIL);
+ if (ptr) {
+ if (!((uintptr_t)ptr & align_mask))
return ptr;
- if (!(++retries % 100))
- xfs_err(NULL,
- "%s(%u) possible memory allocation deadlock size %zu in %s (mode:0x%x)",
- current->comm, current->pid,
- newsize, __func__, lflags);
- congestion_wait(BLK_RW_ASYNC, HZ/50);
- } while (1);
+ kfree(ptr);
+ }
+ return __kmem_vmalloc(size, flags);
}
void *
-kmem_zone_alloc(kmem_zone_t *zone, xfs_km_flags_t flags)
+kmem_alloc_large(size_t size, xfs_km_flags_t flags)
{
- int retries = 0;
- gfp_t lflags = kmem_flags_convert(flags);
void *ptr;
- do {
- ptr = kmem_cache_alloc(zone, lflags);
- if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP)))
- return ptr;
- if (!(++retries % 100))
- xfs_err(NULL,
- "%s(%u) possible memory allocation deadlock in %s (mode:0x%x)",
- current->comm, current->pid,
- __func__, lflags);
- congestion_wait(BLK_RW_ASYNC, HZ/50);
- } while (1);
+ trace_kmem_alloc_large(size, flags, _RET_IP_);
+
+ ptr = kmem_alloc(size, flags | KM_MAYFAIL);
+ if (ptr)
+ return ptr;
+ return __kmem_vmalloc(size, flags);
}
--
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