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alloc_pages_bulk_node() may partially succeed and allocate fewer than the requested nr_pages. There are several conditions under which this can occur, but we have encountered the case where CONFIG_PAGE_OWNER is enabled causing all bulk allocations to always fallback to single page allocations due to commit187ad460b8("mm/page_alloc: avoid page allocator recursion with pagesets.lock held"). Currently vm_module_tags_populate() immediately fails when alloc_pages_bulk_node() returns fewer than the requested number of pages. When this happens memory allocation profiling gets disabled, for example [ 14.297583] [9: modprobe: 465] Failed to allocate memory for allocation tags in the module scsc_wlan. Memory allocation profiling is disabled! [ 14.299339] [9: modprobe: 465] modprobe: Failed to insmod '/vendor/lib/modules/scsc_wlan.ko' with args '': Out of memory This patch causes vm_module_tags_populate() to retry bulk allocations for the remaining memory instead of failing immediately which will avoid the disablement of memory allocation profiling. Link: https://lkml.kernel.org/r/20250409225111.3770347-1-tjmercier@google.com Fixes:0f9b685626("alloc_tag: populate memory for module tags as needed") Signed-off-by: T.J. Mercier <tjmercier@google.com> Reported-by: Janghyuck Kim <janghyuck.kim@samsung.com> Acked-by: Suren Baghdasaryan <surenb@google.com> Cc: Kent Overstreet <kent.overstreet@linux.dev> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.