linux/fs/xfs/kmem.c
Christoph Hellwig 88dca4ca5a mm: remove the pgprot argument to __vmalloc
The pgprot argument to __vmalloc is always PAGE_KERNEL now, so remove it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com> [hyperv]
Acked-by: Gao Xiang <xiang@kernel.org> [erofs]
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Wei Liu <wei.liu@kernel.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mackerras <paulus@ozlabs.org>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Link: http://lkml.kernel.org/r/20200414131348.444715-22-hch@lst.de
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-06-02 10:59:11 -07:00

139 lines
3.2 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#include "xfs.h"
#include <linux/backing-dev.h>
#include "xfs_message.h"
#include "xfs_trace.h"
void *
kmem_alloc(size_t size, xfs_km_flags_t flags)
{
int retries = 0;
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))
return ptr;
if (!(++retries % 100))
xfs_err(NULL,
"%s(%u) possible memory allocation deadlock size %u in %s (mode:0x%x)",
current->comm, current->pid,
(unsigned int)size, __func__, lflags);
congestion_wait(BLK_RW_ASYNC, HZ/50);
} while (1);
}
/*
* __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 = kmem_flags_convert(flags);
if (flags & KM_NOFS)
nofs_flag = memalloc_nofs_save();
ptr = __vmalloc(size, lflags);
if (flags & KM_NOFS)
memalloc_nofs_restore(nofs_flag);
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_alloc_io(size_t size, int align_mask, xfs_km_flags_t flags)
{
void *ptr;
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;
kfree(ptr);
}
return __kmem_vmalloc(size, flags);
}
void *
kmem_alloc_large(size_t size, xfs_km_flags_t flags)
{
void *ptr;
trace_kmem_alloc_large(size, flags, _RET_IP_);
ptr = kmem_alloc(size, flags | KM_MAYFAIL);
if (ptr)
return ptr;
return __kmem_vmalloc(size, flags);
}
void *
kmem_realloc(const void *old, size_t newsize, xfs_km_flags_t flags)
{
int retries = 0;
gfp_t lflags = kmem_flags_convert(flags);
void *ptr;
trace_kmem_realloc(newsize, flags, _RET_IP_);
do {
ptr = krealloc(old, newsize, lflags);
if (ptr || (flags & KM_MAYFAIL))
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);
}
void *
kmem_zone_alloc(kmem_zone_t *zone, xfs_km_flags_t flags)
{
int retries = 0;
gfp_t lflags = kmem_flags_convert(flags);
void *ptr;
trace_kmem_zone_alloc(kmem_cache_size(zone), flags, _RET_IP_);
do {
ptr = kmem_cache_alloc(zone, lflags);
if (ptr || (flags & KM_MAYFAIL))
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);
}