Michal Hocko 9a8da05d7a Revert "mm: introduce PF_MEMALLOC_NORECLAIM, PF_MEMALLOC_NOWARN" ... This reverts commit eab0af905b. There is no existing user of those flags. PF_MEMALLOC_NOWARN is dangerous because a nested allocation context can use GFP_NOFAIL which could cause unexpected failure. Such a code would be hard to maintain because it could be deeper in the call chain. PF_MEMALLOC_NORECLAIM has been added even when it was pointed out [1] that such a allocation contex is inherently unsafe if the context doesn't fully control all allocations called from this context. While PF_MEMALLOC_NOWARN is not dangerous the way PF_MEMALLOC_NORECLAIM is it doesn't have any user and as Matthew has pointed out we are running out of those flags so better reclaim it without any real users. [1] https://lore.kernel.org/all/ZcM0xtlKbAOFjv5n@tiehlicka/ Link: https://lkml.kernel.org/r/20240926172940.167084-3-mhocko@kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christian Brauner <brauner@kernel.org> Cc: James Morris <jmorris@namei.org> Cc: Jan Kara <jack@suse.cz> Cc: Kent Overstreet <kent.overstreet@linux.dev> Cc: Paul Moore <paul@paul-moore.com> Cc: Serge E. Hallyn <serge@hallyn.com> Cc: Yafang Shao <laoar.shao@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2024-10-09 12:47:19 -07:00
..
affinity.h
autogroup.h
clock.h
cond_resched.h
coredump.h
cpufreq.h
cputime.h
deadline.h
debug.h
ext.h	sched_ext: Compact struct bpf_iter_scx_dsq_kern	2024-09-09 13:42:47 -10:00
hotplug.h
idle.h
init.h
isolation.h
jobctl.h
loadavg.h
mm.h	Revert "mm: introduce PF_MEMALLOC_NORECLAIM, PF_MEMALLOC_NOWARN"	2024-10-09 12:47:19 -07:00
nohz.h
numa_balancing.h
posix-timers.h
prio.h
rseq_api.h
rt.h
sd_flags.h
signal.h
smt.h
stat.h
sysctl.h
task_flags.h
task_stack.h
task.h	sched_ext: TASK_DEAD tasks must be switched into SCX on ops_enable	2024-09-04 10:23:32 -10:00
thread_info_api.h
topology.h
types.h
user.h
vhost_task.h
wake_q.h
xacct.h