On Wed, Dec 20, 2023 at 8:17 PM 'Nathan Memmott' via blink-dev < blink-dev@chromium.org> wrote:
> Howdy blink-dev, > > In Chromium M121, we will update how the File System Access (FSA) API > interacts with the back/forward cache (BFCache). This should only affect > the conditions a page can remain in the BFCache. There should be no > behavioral changes to the FSA API. > > A page can hold FSA locks to files via FileSystemWritableFileStream, > FileSystemSyncAccessHandle, and file operations. These FSA locks prevent > incompatible concurrent access to a file (e.g. having both a writable and > access handle open on a file). A page in BFCache can hold FSA locks and > prevent an active (not in BFCache) page from accessing a file. This can be > unexpected behavior to a developer/user. > > The changes made in Chromium M121 address this issue by evicting a page in > BFCache if it allows another page to take an FSA lock. If it doesn't allow > another page to take an FSA lock, then the page can remain in BFCache. > This might be a misunderstanding in terminology on my part, but is this backwards? If the BFCache page allows an active page to acquire a lock, then it's evicted? Or is it then allowed to stay? > This doesn't break any assumptions about concurrent access. An FSA lock is > not given out until incompatible FSA locks have been released. > > This PR for the whatwg/fs spec defines the behavior in more detail: > https://github.com/whatwg/fs/pull/154 > > Thanks, > Nathan > > -- > You received this message because you are subscribed to the Google Groups > "blink-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to blink-dev+unsubscr...@chromium.org. > To view this discussion on the web visit > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAO4d-SusHj7XEePhBqBkvH24Q50KHF%3DhMNOPpK5wkwpGvkwe4g%40mail.gmail.com > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAO4d-SusHj7XEePhBqBkvH24Q50KHF%3DhMNOPpK5wkwpGvkwe4g%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+unsubscr...@chromium.org. To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CADsXd2P7af9MprWmij%3DCpzYNgmHg8sxnC%3DDYVvPOP%3DLqr6kzHg%40mail.gmail.com.
