linux-5.15/prepare_alloc_pages()
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開始行:
*参照元 [#uc4473c9]
#backlinks
*説明 [#fca910a8]
-パス: [[linux-5.15/mm/page_alloc.c]]
-FIXME: これは何？
--説明
**引数 [#s967a4d9]
-gfp_t gfp_mask
--
--[[linux-5.15/gfp_t]]
-unsigned int order
--
-int preferred_nid
--
-nodemask_t *nodemask
--
--[[linux-5.15/nodemask_t]]
-struct alloc_context *ac
--
--[[linux-5.15/alloc_context]]
-gfp_t *alloc_gfp
--
--[[linux-5.15/gfp_t]]
-unsigned int *alloc_flags
--
**返り値 [#gc24da19]
-bool
--
**参考 [#la9ce997]
*実装 [#h2a0f258]
static inline bool prepare_alloc_pages(gfp_t gfp_mask, u...
int preferred_nid, nodemask_t *nodemask,
struct alloc_context *ac, gfp_t *alloc_gfp,
unsigned int *alloc_flags)
{
ac->highest_zoneidx = gfp_zone(gfp_mask);
ac->zonelist = node_zonelist(preferred_nid, gfp_mask);
ac->nodemask = nodemask;
ac->migratetype = gfp_migratetype(gfp_mask);
if (cpusets_enabled()) {
*alloc_gfp |= __GFP_HARDWALL;
/*
* When we are in the interrupt context, it is irrelev...
* to the current task context. It means that any node...
*/
if (in_task() && !ac->nodemask)
ac->nodemask = &cpuset_current_mems_allowed;
else
*alloc_flags |= ALLOC_CPUSET;
}
-
--[[linux-5.15/gfp_zone()]]
--[[linux-5.15/node_zonelist()]]
--[[linux-5.15/gfp_migratetype()]]
--[[linux-5.15/cpusets_enabled()]]
--[[linux-5.15/in_task()]]
fs_reclaim_acquire(gfp_mask);
fs_reclaim_release(gfp_mask);
might_sleep_if(gfp_mask & __GFP_DIRECT_RECLAIM);
if (should_fail_alloc_page(gfp_mask, order))
return false;
*alloc_flags = gfp_to_alloc_flags_cma(gfp_mask, *alloc_...
-
--[[linux-5.15/fs_reclaim_acquire()]]
--[[linux-5.15/fs_reclaim_release()]]
--[[linux-5.15/might_sleep_if()]]
--[[linux-5.15/should_fail_alloc_page()]]
--[[linux-5.15/gfp_to_alloc_flags_cma()]]
/* Dirty zone balancing only done in the fast path */
ac->spread_dirty_pages = (gfp_mask & __GFP_WRITE);
/*
* The preferred zone is used for statistics but crucia...
* also used as the starting point for the zonelist ite...
* may get reset for allocations that ignore memory pol...
*/
ac->preferred_zoneref = first_zones_zonelist(ac->zoneli...
ac->highest_zoneidx, ac->nodemask);
return true;
}
-
--[[linux-5.15/first_zones_zonelist()]]
*コメント [#ief6188b]
終了行:
*参照元 [#uc4473c9]
#backlinks
*説明 [#fca910a8]
-パス: [[linux-5.15/mm/page_alloc.c]]
-FIXME: これは何？
--説明
**引数 [#s967a4d9]
-gfp_t gfp_mask
--
--[[linux-5.15/gfp_t]]
-unsigned int order
--
-int preferred_nid
--
-nodemask_t *nodemask
--
--[[linux-5.15/nodemask_t]]
-struct alloc_context *ac
--
--[[linux-5.15/alloc_context]]
-gfp_t *alloc_gfp
--
--[[linux-5.15/gfp_t]]
-unsigned int *alloc_flags
--
**返り値 [#gc24da19]
-bool
--
**参考 [#la9ce997]
*実装 [#h2a0f258]
static inline bool prepare_alloc_pages(gfp_t gfp_mask, u...
int preferred_nid, nodemask_t *nodemask,
struct alloc_context *ac, gfp_t *alloc_gfp,
unsigned int *alloc_flags)
{
ac->highest_zoneidx = gfp_zone(gfp_mask);
ac->zonelist = node_zonelist(preferred_nid, gfp_mask);
ac->nodemask = nodemask;
ac->migratetype = gfp_migratetype(gfp_mask);
if (cpusets_enabled()) {
*alloc_gfp |= __GFP_HARDWALL;
/*
* When we are in the interrupt context, it is irrelev...
* to the current task context. It means that any node...
*/
if (in_task() && !ac->nodemask)
ac->nodemask = &cpuset_current_mems_allowed;
else
*alloc_flags |= ALLOC_CPUSET;
}
-
--[[linux-5.15/gfp_zone()]]
--[[linux-5.15/node_zonelist()]]
--[[linux-5.15/gfp_migratetype()]]
--[[linux-5.15/cpusets_enabled()]]
--[[linux-5.15/in_task()]]
fs_reclaim_acquire(gfp_mask);
fs_reclaim_release(gfp_mask);
might_sleep_if(gfp_mask & __GFP_DIRECT_RECLAIM);
if (should_fail_alloc_page(gfp_mask, order))
return false;
*alloc_flags = gfp_to_alloc_flags_cma(gfp_mask, *alloc_...
-
--[[linux-5.15/fs_reclaim_acquire()]]
--[[linux-5.15/fs_reclaim_release()]]
--[[linux-5.15/might_sleep_if()]]
--[[linux-5.15/should_fail_alloc_page()]]
--[[linux-5.15/gfp_to_alloc_flags_cma()]]
/* Dirty zone balancing only done in the fast path */
ac->spread_dirty_pages = (gfp_mask & __GFP_WRITE);
/*
* The preferred zone is used for statistics but crucia...
* also used as the starting point for the zonelist ite...
* may get reset for allocations that ignore memory pol...
*/
ac->preferred_zoneref = first_zones_zonelist(ac->zoneli...
ac->highest_zoneidx, ac->nodemask);
return true;
}
-
--[[linux-5.15/first_zones_zonelist()]]
*コメント [#ief6188b]
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