forked from mirrors/linux
7b60041156
zpool_malloc_support_movable() always returns true for zsmalloc, the only remaining zpool driver. Remove it and set the gfp flags in zswap_compress() accordingly. Opportunistically use GFP_NOWAIT instead of __GFP_NOWARN | __GFP_KSWAPD_RECLAIM for conciseness as they are equivalent. Link: https://lkml.kernel.org/r/20250305061134.4105762-6-yosry.ahmed@linux.dev Signed-off-by: Yosry Ahmed <yosry.ahmed@linux.dev> Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Nhat Pham <nphamcs@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Chengming Zhou <chengming.zhou@linux.dev> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Minchan Kim <minchan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* zpool memory storage api
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*
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* Copyright (C) 2014 Dan Streetman
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*
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* This is a common frontend for the zswap compressed memory storage
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* implementations.
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*/
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#ifndef _ZPOOL_H_
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#define _ZPOOL_H_
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struct zpool;
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bool zpool_has_pool(char *type);
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struct zpool *zpool_create_pool(const char *type, const char *name, gfp_t gfp);
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const char *zpool_get_type(struct zpool *pool);
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void zpool_destroy_pool(struct zpool *pool);
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int zpool_malloc(struct zpool *pool, size_t size, gfp_t gfp,
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unsigned long *handle);
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void zpool_free(struct zpool *pool, unsigned long handle);
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void *zpool_obj_read_begin(struct zpool *zpool, unsigned long handle,
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void *local_copy);
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void zpool_obj_read_end(struct zpool *zpool, unsigned long handle,
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void *handle_mem);
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void zpool_obj_write(struct zpool *zpool, unsigned long handle,
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void *handle_mem, size_t mem_len);
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u64 zpool_get_total_pages(struct zpool *pool);
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/**
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* struct zpool_driver - driver implementation for zpool
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* @type: name of the driver.
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* @list: entry in the list of zpool drivers.
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* @create: create a new pool.
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* @destroy: destroy a pool.
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* @malloc: allocate mem from a pool.
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* @free: free mem from a pool.
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* @sleep_mapped: whether zpool driver can sleep during map.
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* @map: map a handle.
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* @unmap: unmap a handle.
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* @total_size: get total size of a pool.
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*
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* This is created by a zpool implementation and registered
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* with zpool.
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*/
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struct zpool_driver {
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char *type;
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struct module *owner;
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atomic_t refcount;
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struct list_head list;
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void *(*create)(const char *name, gfp_t gfp);
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void (*destroy)(void *pool);
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int (*malloc)(void *pool, size_t size, gfp_t gfp,
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unsigned long *handle);
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void (*free)(void *pool, unsigned long handle);
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void *(*obj_read_begin)(void *pool, unsigned long handle,
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void *local_copy);
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void (*obj_read_end)(void *pool, unsigned long handle,
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void *handle_mem);
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void (*obj_write)(void *pool, unsigned long handle,
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void *handle_mem, size_t mem_len);
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u64 (*total_pages)(void *pool);
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};
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void zpool_register_driver(struct zpool_driver *driver);
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int zpool_unregister_driver(struct zpool_driver *driver);
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bool zpool_can_sleep_mapped(struct zpool *pool);
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#endif
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