Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
mem: fix freeing segments in --huge-unlink mode
[ upstream commit edf20bd ] When using huge_unlink we unlink the segment right after allocation. Although we unlink the file we keep the fd in fd_list so file still exist just the path deleted. When freeing the hugepage we need to close the fd and assign it with (-1) in fd_list for the page to be released. The current flow fails rte_malloc in the following flow when working with --huge-unlink option: 1. alloc_seg() for segment A - We allocate a segment, unlink the path to the segment and keep the file descriptor in fd_list. 2. free_seg() for segment A - We clear the segment metadata and return - without closing fd or assigning (-1) in fd list. 3. alloc_seg() for segment A again - We find segment A as available, try to allocate it, find the old fd in fd_list try to unlink it as part of alloc_seg() but failed because path doesn't exist. The impact of such error is falsely failing rte_malloc() although we have hugepages available. Fixes: d435aad ("mem: support --huge-unlink mode") Signed-off-by: Roy Shterman <roy.shterman@vastdata.com> Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
- Loading branch information