mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 22:21:40 +00:00
707e0ddaf6
Since no caller is using KM_NOSLEEP and no callee branches on KM_SLEEP, we can remove KM_NOSLEEP and replace KM_SLEEP with 0. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*/
|
|
#include <linux/sched/mm.h>
|
|
#include <linux/backing-dev.h>
|
|
#include "kmem.h"
|
|
#include "xfs_message.h"
|
|
|
|
void *
|
|
kmem_alloc(size_t size, xfs_km_flags_t flags)
|
|
{
|
|
int retries = 0;
|
|
gfp_t lflags = kmem_flags_convert(flags);
|
|
void *ptr;
|
|
|
|
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);
|
|
}
|
|
|
|
void *
|
|
kmem_alloc_large(size_t size, xfs_km_flags_t flags)
|
|
{
|
|
unsigned nofs_flag = 0;
|
|
void *ptr;
|
|
gfp_t lflags;
|
|
|
|
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);
|
|
|
|
if (flags & KM_NOFS)
|
|
memalloc_nofs_restore(nofs_flag);
|
|
|
|
return ptr;
|
|
}
|
|
|
|
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;
|
|
|
|
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;
|
|
|
|
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);
|
|
}
|