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When memory pinned with ib_umem_get() is released, ib_umem_release() needs to subtract the amount of memory being unpinned from mm->locked_vm. However, ib_umem_release() may be called with mm->mmap_sem already held for writing if the memory is being released as part of an munmap() call, so it is sometimes necessary to defer this accounting into a workqueue. However, the work struct used to defer this accounting is dynamically allocated before it is queued, so there is the possibility of failing that allocation. If the allocation fails, then ib_umem_release has no choice except to bail out and leave the process with a permanently elevated locked_vm. Fix this by allocating the structure to defer accounting as part of the original struct ib_umem, so there's no possibility of failing a later allocation if creating the struct ib_umem and pinning memory succeeds. Signed-off-by: Roland Dreier <rolandd@cisco.com> |
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| .. | ||
| ib_addr.h | ||
| ib_cache.h | ||
| ib_cm.h | ||
| ib_fmr_pool.h | ||
| ib_mad.h | ||
| ib_marshall.h | ||
| ib_pack.h | ||
| ib_sa.h | ||
| ib_smi.h | ||
| ib_umem.h | ||
| ib_user_cm.h | ||
| ib_user_mad.h | ||
| ib_user_sa.h | ||
| ib_user_verbs.h | ||
| ib_verbs.h | ||
| iw_cm.h | ||
| Kbuild | ||
| rdma_cm_ib.h | ||
| rdma_cm.h | ||
| rdma_user_cm.h | ||